Weather Information and Maritime Transport Risk

Weather Information and Maritime Transport Risk

Weather information and maritime transport risk refers to the operational process of connecting weather and sea-state information—such as typhoons, developing low-pressure systems, strong winds, storms, waves, swell, storm surge, fog, restricted visibility and icing—to vessel schedules, port operations, cargo damage, additional costs, marine cargo insurance, carrier liability and incident response.

Weather is not merely background information in maritime transport. It may result in vessel slowdown, weather routing, deviation, postponed departure, anchorage waiting, port-entry restriction, berth delay, suspension of cargo handling, port closure, port omission, port rotation change, transshipment delay, CY or CFS suspension and interruption of domestic delivery.

The effect is not limited to delay. Strong winds, waves, seawater ingress, storm surge, flooding, rainwater, condensation, cargo shifting, container damage, loss of reefer power or temperature deviation may cause physical cargo damage.

A freight forwarder, NVOCC, shipper, cargo owner, warehouse, customs broker, delivery provider and insurance practitioner should therefore use weather information as operational information for identifying the affected transport stage, cargo location, pending event, possible damage and records that must be preserved.

The existence of a typhoon or heavy weather does not automatically establish the cause of delay, cause of cargo damage, carrier exemption, freight forwarder responsibility or marine cargo insurance coverage. The weather conditions, actual vessel operation, port operation, cargo status, contract and incident records must be examined separately.

Scope of This Article

Item	Covered in This Article	Covered in Other Articles
Weather and sea-state information	Operational use of marine warnings, forecasts, typhoons, waves, storm surge, wind and fog	Specialized meteorological interpretation is provided by the relevant official meteorological authority
Delay due to typhoon and heavy weather	How weather information is used to identify the affected operation, inquiry source and evidence	The detailed delay chain affecting voyage, berthing, handling, pickup and delivery is covered in “Delay Due to Typhoon and Bad Weather”
Vessel schedule	Relationship between weather, ETD, ETA, port rotation, port omission and connection changes	The complete schedule structure is covered in “Vessel Schedule”
Vessel arrival delay	Effects before arrival and during post-arrival operations	The distinction between ETA delay and berthing, handling and pickup delay is covered in “Vessel Arrival Delay”
Port closure and work suspension	Effects on port entry, handling, gates, CY, CFS and drayage	Individual closure, reopening and facility operation are governed by the relevant port and terminal notices
Cargo damage	Initial review of seawater, rainwater, condensation, shifting, storm surge and temperature damage	Detailed causation, survey and recovery are covered in the relevant cargo-claim articles
Marine cargo insurance	Distinction between delay and physical damage and the need for notice and evidence preservation	Coverage, exclusions and claims are covered in “Delay and Marine Cargo Insurance” and related insurance articles
Carrier liability	Heavy weather, force majeure, perils of the sea, stowage, lashing, seaworthiness and mitigation	Detailed liability systems and limitation are covered in the relevant carrier-liability articles
Temperature-controlled cargo	Weather delay, power connection, yard dwell, temperature records and quality review	Reefer settings, PTI and detailed temperature-deviation analysis are covered in the relevant reefer articles
Additional costs	Initial review of vehicle rescheduling, waiting, storage, alternative transport, power, inspection and survey costs	Detailed cost evidence and allocation are covered in “Additional Costs Due to Delay”
General average	Possibility that refuge, towage, cargo sacrifice or extraordinary expenditure may raise general-average issues	Requirements, guarantees and adjustment are covered in the general-average article

The central purpose of this article is not to predict the exact number of days of delay caused by a particular storm. It is to identify the relevant information, affected transport stage, cargo risk, insurance issue, liability issue and evidence-preservation requirement.

Relationship with “Delay Due to Typhoon and Bad Weather”

Comparison	Weather Information and Maritime Transport Risk	Delay Due to Typhoon and Bad Weather	Operational Use
Central subject	Connects weather information to transport, cargo damage, insurance, liability and evidence	Reviews the operational delay chain after heavy weather affects transport	Use this article for information and evidence; use the delay article for active operational delay management
Main information	Official warnings, forecasts, waves, storm surge, port notices, operation notices and cargo records	Vessel position, ETD, ETA, berthing, handling, pickup and delivery	Distinguish source evaluation from identification of the operation currently delayed
Cargo damage	Reviews the relationship between weather and wet damage, cargo shifting or temperature deviation	Checks whether a physical loss exists in addition to delay	Use this article for causation records and the delay article for operational status
Marine cargo insurance	Reviews notice, policy conditions, cause and evidence	Initially separates delay alone from physical cargo damage	The two articles should be used together
Carrier liability	Reviews weather severity, foreseeability, stowage, lashing, equipment and mitigation	Primarily reviews delay notice, alternatives and customer communication	Evidence under this article becomes important in liability disputes
Main output	Source list, chronology, weather evidence, incident record and liability materials	Revised schedule, affected operation, pickup outlook, delivery outlook and alternative plan	Both outputs may be required in the same shipment

Main Weather and Sea-State Information Used in Maritime Transport

Information	Meaning	Mainly Affected Operation	Operational Review	Caution
Typhoon information	Position, forecast track, pressure and wind area	Route, port entry, berthing, handling, CY and delivery	Relationship between the storm, route, port and expected time of approach	The forecast track changes and must be updated
Marine warning	Warning of storm, gale, wind, swell, icing, fog or another marine hazard	Navigation, safe operation and port work	Affected sea area, warning type and issue or cancellation time	A warning alone does not establish the individual vessel's operational response
Marine forecast	Expected wind, waves, visibility and weather by sea area	Voyage planning, slowdown, deviation and arrival outlook	Relevant route and forecast period	Combine it with the vessel position and operational notice
Wave and swell information	Wave height, period, direction and swell	Navigation, cargo handling, harbour entrance and mooring	Sea area, harbour conditions and handling restrictions	High waves and swell may remain after the wind weakens
Storm-surge information	Expected rise in sea level and possible coastal or port flooding	Port, yard, warehouse, gates and domestic delivery	Expected time, tide, cargo location and flood protection	The main damage may occur to cargo stored ashore
Strong-wind or storm information	Expected strong or storm-force winds	Cranes, empty containers, gates and drayage	Crane restrictions, vehicle restrictions and empty-container work	Work-suspension standards differ by port and terminal
Fog and visibility information	Restricted visibility affecting navigation	Port entry, pilotage, berthing and navigation	Port restriction, pilot schedule and waiting time	Significant delay may occur without rain or strong wind
Low-pressure system and front information	Development and movement of pressure systems and fronts	Wide-area routes and several successive ports	Expected development and position relative to the route	Severe wind and waves may occur without a typhoon
Heavy-rain and flood information	Heavy rain, flooding and road inundation	Warehouse, CY, CFS and domestic transport	Cargo location, access roads and delivery restrictions	Shore operations may stop while the vessel continues operating
Icing and low-temperature information	Vessel icing or very low temperatures	Cold-region navigation, deck equipment and cargo quality	Route, vessel capability and cargo temperature requirements	Separate vessel-operational risk from cargo-temperature risk

Hierarchy and Use of Information Sources

Source	Main Information	Operational Role	Record to Preserve	Limitation
Meteorological authority	Typhoon, marine warning, marine forecast, waves and storm surge	Objective review of weather and sea-state conditions	Issue time, sea area, warning or forecast and revision history	Does not establish the individual vessel or terminal response
Port authority or harbour authority	Port closure, traffic restriction, evacuation or navigation control	Confirmation of port-operation restrictions	Issue and cancellation time, area and restriction	Does not establish the status of the individual container
Terminal, CY or CFS	Gate closure, handling suspension, receiving restriction and reopening	Confirmation of cargo receiving, handling and pickup feasibility	Suspension, reopening, appointment and gate records	Does not show the entire vessel route
Shipping line or NVOCC	Vessel operation, ETD, ETA, deviation, port omission, rotation and alternative	Confirmation of effect on the individual booking and route	Notice time, vessel, voyage, booking and revised plan	May not be the primary observation record of the weather itself
Overseas agent	Local port, transshipment, connection, handling and customs status	Supplementary local and cargo-specific information	Response time, source, cargo location and connection status	May contain reporting delay or second-hand information
Vessel-tracking information	Position, speed, track, arrival and departure	Comparison of actual movement with operational notices	Review time, position, speed and actual event	Does not show cargo condition or the reason for an operational decision
Warehouse or delivery provider	Storage, power, flooding, roads, vehicles and delivery feasibility	Review of the shore-side weather effect	Work suspension, location, power, vehicle and incident records	Must be reviewed separately from the ocean leg
Container and cargo records	EIR, seal, temperature, power, photographs, inspection and survey	Identification of the cargo condition and probable transport stage	Time, location, condition, responsible person and equipment data	Causation between weather and damage requires further analysis

Official weather information is important evidence of the relevant conditions. It does not by itself prove that the delay or cargo damage was caused by those conditions.

Official information, port and terminal notices, shipping line or NVOCC communications, vessel movement and cargo-specific records should be combined chronologically.

Weather-Information Review Timeline

Stage	Information to Review	Operational Purpose	Main Response
Quotation and route proposal	Seasonal typhoon, monsoon, winter storm and fog patterns	Compare routes, direct or transshipment services and cargo suitability	Review buffer time, alternative route and temperature conditions
Booking	Weather outlook during departure and arrival periods, route and transshipment port	Review the initial operational risk	Explain the planned nature of the schedule
Before CY delivery	Strong wind, rain, storm surge, gates and road restrictions	Confirm empty pickup, vanning, drayage and CY feasibility	Consider earlier delivery, postponement or storage change
Before departure	Port closure, handling suspension, ETD and CY cut-off change	Confirm loading feasibility	Review the revised booking, rollover and storage
During voyage	Typhoon track, marine warning, waves, vessel position, slowdown and deviation	Review ETA and effect on later ports	Confirm the revised ETA, port rotation and alternative route
During transshipment	Weather, handling, connecting vessel and port restriction	Confirm successful connection and final ETA	Review cargo location, next vessel and reefer power
Before arrival	Port-entry restriction, berth, handling, storm surge and strong wind	Review berthing, handling and cargo-availability outlook	Provisionally update customs, vehicle and delivery plans
After arrival	Handling reopening, terminal congestion, gates, roads and delivery	Confirm pickup and delivery feasibility	Recalculate the realistic delivery date
After an incident	Contemporaneous warnings, port restrictions, vessel movement and cargo records	Review cause, transport stage, insurance and liability	Preserve evidence, notify parties, survey and mitigate loss

How Weather Effects Cascade Through Transport Operations

Stage	Weather or Sea-State Event	Direct Effect	Effect on Later Operations
1	Typhoon, low pressure, strong wind, high waves or fog develops	Safety conditions for navigation, port entry or handling deteriorate	The carrier, port or terminal makes an operational decision
2	Slowdown, deviation, port restriction or work suspension occurs	ETD, ETA, berthing or handling changes	Port rotation change, port omission or next-vessel waiting may follow
3	Vessel or port operation is delayed	CY, CFS, discharge and terminal availability move later	Customs, D/O, pickup, connection and delivery move later
4	Several vessels and containers accumulate	Congestion remains after the weather improves	Handling order, gate appointments, vehicles and delivery remain unstable
5	Transport or storage time increases	Greater pressure on storage, power, temperature, humidity and packaging	Quality loss, physical damage and additional costs may arise
6	Loss or additional cost arises	Insurance notice, carrier notice, survey and recovery review become necessary	Causation, responsibility and coverage must be analyzed

Improvement in the weather does not necessarily mean that the transport system immediately returns to normal. A backlog of vessels, containers, vehicles and warehouse operations may remain.

Effect on the Vessel Schedule

Operational Measure	Typical Situation	Schedule Effect	Information to Confirm
Slow steaming	The vessel reduces speed for safety in high waves or strong winds	ETA moves later	Vessel position, speed, revised ETA and later ports
Weather routing or deviation	The vessel avoids a storm area	Distance and transit time increase	Revised route, rotation, bunkering and final ETA
Postponed departure	Port closure, handling suspension or departure restriction	ETD and later-port ETAs change	Handling completion, reopening and actual departure
Anchorage waiting	Port-entry restriction, inability to berth or congestion	Berthing and handling start later	Port entry, berth, handling and cargo-availability outlook
Port rotation change	The vessel calls at a less affected port first	Some port ETAs move earlier or later	Relevant port order, connections and CY cut-off
Port omission	A port call is cancelled for safety or schedule recovery	An alternative port, later vessel or revised route is required	Affected cargo, alternative port, customs and delivery
Blank sailing	The sailing or service is cancelled or suspended	Cargo moves to a later or alternative service	Booking transfer, next-vessel space and storage
Transshipment connection change	The transshipment port or connecting vessel is affected	The final ETA may move substantially later	Cargo location, connecting vessel, actual loading and final ETA

Weather information alone does not establish which operational measure the shipping line or master will select. The actual vessel notice, route, port restriction and individual booking should be reviewed.

Relationship with Port Closure and Handling Suspension

Operation or Facility	Possible Heavy-Weather Measure	Export Effect	Import Effect	Party to Contact
Harbour entrance or channel	Entry restriction, traffic suspension or evacuation	Departure postponement or vessel change	Port-entry and berthing delay	Port authority and shipping line
Berth	Berthing suspension, unberthing or reinforced mooring	Loading start or completion delay	Discharge delay	Shipping line and terminal
Gantry crane	Suspension because of strong wind	Failure to load or rollover	Discharge and terminal-availability delay	Terminal
CY gate	Receiving or pickup suspension	Failure to meet the CY cut-off	Pickup and delivery delay	Terminal and drayage provider
Empty-container depot	Pickup or return suspension	Vanning delay and empty-container shortage	Empty-return delay and possible Detention	Depot, shipping line and drayage provider
CFS or warehouse	Receiving, devanning, inspection or work suspension	LCL receiving and shipment delay	Pickup, inspection and delivery delay	CFS or warehouse
Road or bridge	Closure, speed restriction or flooding	Collection and CY delivery become impossible	Drayage and domestic delivery become impossible	Road authority and delivery provider

Effect on Export Operations

Export Operation	Main Weather Effect	Information to Confirm	Response
Empty-container pickup	Depot closure, strong wind or road restriction	Pickup hours, alternative depot and container availability	Consider earlier pickup or rescheduling
Vanning	Warehouse closure, rainwater exposure or labour shortage	Work location, indoor operation, packaging and waterproofing	Postpone work or protect the cargo
Export customs	Cargo delay, inspection change or document timing	Declaration, permission, inspection and cargo receipt	Share the revised workflow with the customs broker
Drayage	Road restriction, strong wind, vehicle shortage or waiting	Vehicle, cancellation terms and alternative route	Reschedule the vehicle and route promptly
CY or CFS delivery	Gate suspension, receiving restriction or cut-off change	Latest deadline, receiving location and late-gate possibility	Confirm the revised booking and terminal notice
Vessel loading	Handling suspension, port omission, blank sailing or rollover	Actual loading, next vessel, alternative port and cargo status	Review another vessel, port and document amendment

A later ETD does not necessarily extend the CY cut-off, SI deadline or VGM deadline. Each deadline should be reconfirmed separately.

Effect on Import Operations

Import Operation	Main Weather Effect	Information to Confirm	Response
Vessel arrival	Slowdown, deviation, previous-port delay or entry waiting	Vessel position, revised ETA and berthing	Provisionally update customs and delivery
Berthing and handling	Strong wind or waves prevent berthing or crane work	Berth, handling and individual-container status	Do not treat cargo availability as confirmed
Terminal availability	Handling backlog, yard congestion or system delay	Cargo-availability date and container position	Update customs and pickup planning
D/O and import customs	Arrival change, terminal delay or inspection amendment	Release, declaration, inspection and permission	Separate procedure completion from pickup availability
Container pickup	Gate closure, appointment congestion or drayage shortage	Appointment, vehicle, roads and Free Time	Review another slot, vehicle or extension
Delivery	Road restriction, receiver closure or receiving-slot change	Route, vehicle and receiving conditions	Separate provisional and confirmed delivery dates

Effect on Transshipment Cargo

Affected Stage	Possible Problem	Information to Confirm	Caution
First leg	Departure delay, slowdown or late arrival at the transshipment port	Actual departure, transshipment ETA and connection time	A delay of several hours may cause a missed connection
Transshipment port	Port closure, handling suspension or yard dwell	Discharge, cargo location, transfer and reefer power	Arrival at the port is not successful connection
Connecting vessel	Delay, port omission, blank sailing or space revision	Vessel, voyage, ETD and actual loading	Distinguish a candidate vessel from confirmed loading
Alternative transshipment port	Route change, additional transfer or longer transit	New route, cargo acceptance and dangerous-goods approval	Review connection reliability as well as the earliest ETA
Final discharge port	Berthing, handling or pickup delay	Final ETA, Arrival Notice, pickup and delivery	The final port may remain affected after a successful connection

Weather Risk and Cargo Damage

Damage	Relationship with Weather or Sea State	Documents and Records	Causation Caution
Cargo shifting or impact damage	Vessel motion, high waves and rapid acceleration	Packaging, internal securing, stowage, voyage and photographs	Review packaging and securing as well as weather
Seawater damage	Waves, container damage and seawater exposure	Salt test, container exterior, holes, doors and stowage position	Distinguish seawater from rainwater and condensation
Rainwater damage	Rain during handling, storage or domestic transport	Handling time, weather, roof, packaging and photographs	Identify the transport stage
Storm-surge or flood damage	Flooding of yard, warehouse or road	Tide, flood area, storage position and movement records	Review storage selection and protective measures
Condensation, mould or rust	Temperature difference, long transit and insufficient moisture control	Packaging, desiccant, temperature, humidity and container	Separate weather, inherent vice and packaging deficiency
Temperature deviation	Heat, cold, power loss, incorrect setting or extended dwell	Set point, PTI, temperature, power and alarm	Separate delay, equipment, operation and cargo condition
Container damage or loss overboard	Heavy weather, waves, lashing failure or deck incident	Stowage, lashing, vessel record, photographs and survey	Review weather severity and stowage management
Quality deterioration	Extended delay, temperature, humidity and cargo characteristics	Production, expiry, temperature, inspection and sales conditions	Distinguish an accident from natural deterioration

Relationship with Additional Costs

Cost Item	Typical Situation	Documents and Records	Allocation Consideration
Drayage rescheduling	Gate closure, CY cut-off change or pickup amendment	Vehicle record, cancellation and change notice	Notice time, instructing party and possible avoidance
Waiting or cancellation	Vehicle, handling, warehouse or receiving work stops	Waiting record, work report and booking terms	Location, cause, advance notice and approval
Warehouse or yard storage	Shipment, pickup or delivery is postponed	Storage period, invoice and cargo condition	Cause and contractual scope of extended storage
Reefer power and monitoring	Temperature-controlled cargo remains longer in a yard	Power period, connection and monitoring record	Necessity, tariff, instruction and approval
Alternative transport	Another port, shipping line, route or airfreight is used	Alternative, quotation, approval and deadline effect	Who proposed, selected and approved the measure
Inspection and segregation	Wet damage, temperature deviation or quality loss is suspected	Inspection report, work record and photographs	Whether the work was necessary to assess or mitigate loss
Survey	Professional causation and quantum review is required	Instruction, survey report and invoice	Instructing party, insurance terms and recovery
Demurrage or Detention	Pickup or return exceeds Free Time	Cargo availability, Free Time, pickup and return	Commencement, waiver, extension and actual feasibility
Receiving-appointment amendment	A factory, retailer or warehouse slot changes	Appointment terms, notice and invoice	Whether it is a transport or commercial cost

The existence of a weather-related cost and the right to recover it from the shipping line, NVOCC, freight forwarder, shipper, cargo owner or another party are separate issues.

The contract, B/L terms, booking conditions, entrusted work, nature and location of the cost, notice time, instructions, approval and possible mitigation must be reviewed.

Relationship with Marine Cargo Insurance

Delay to a vessel or delivery caused by typhoon, heavy weather or port closure may not by itself be covered by ordinary marine cargo insurance.

Where physical cargo damage occurs, including seawater damage, container damage, cargo shifting, storm-surge flooding, handling damage or reefer temperature deviation, the insurance conditions and cause of loss must be reviewed.

Situation	Main Insurance Issue	Documents and Records	Initial Action
Only vessel or delivery delay occurs	Treatment of delay or commercial loss	Change notice, transport contract and policy conditions	Do not assume coverage; review the policy
Wet damage is found after heavy weather	Rainwater, seawater, condensation and transport stage	Photographs, salt test, container and receipt record	Notify the insurer and carrier and preserve the condition
Cargo shifting or breakage occurs	Weather, packaging, securing, stowage and handling	Packaging, photographs, stowage and voyage record	Confirm the need for survey before movement or disposal
Storm-surge flooding occurs	Storage location, flooding and transport stage	Tide, flood photographs, receipt and warehouse records	Move cargo safely and mitigate further damage
Reefer temperature deviation occurs	Set point, power, equipment, cargo temperature and delay	PTI, temperature, power, alarm and inspection	Secure power, maintain temperature and arrange expert review
Only quality deterioration is found	Physical accident, delay, natural deterioration or inherent vice	Production, shipment, temperature, inspection and expiry	Review causation and quantum separately

Where an incident is suspected, the need to notify the insurer, carrier, NVOCC and other relevant parties should be reviewed promptly.

Relationship with Carrier Liability

Heavy weather, typhoon, perils of the sea or force majeure may be relevant to a carrier's defence or limitation of liability.

Heavy weather does not automatically exempt the carrier. The applicable law, transport terms and facts may require review of the following matters.

Review Item	Information to Confirm	Documents and Records	Caution
Severity of weather	Wind, waves, track, warning, duration and route position	Weather material, voyage record and vessel report	Distinguish ordinary bad weather from severe sea conditions
Foreseeability	Information available before departure or during the voyage	Forecast, warning, voyage plan and notice	Foreseeability alone does not determine liability
Navigation and deviation decision	Slowdown, deviation, waiting or port change	Voyage record, shipping line notice and master's report	Review the circumstances at the time of the decision
Seaworthiness and equipment	Hull, hatch, reefer equipment, drainage and safety equipment	Maintenance, inspection and incident report	Review the applicable obligation and causal relationship
Stowage and lashing	Vessel stowage, lashing and cargo securing inside the container	Stowage plan, lashing, packaging and photographs	Separate vessel-side and shipper-side work
Reefer management	Set point, power, monitoring and alarm response	PTI, temperature and power records	Separate equipment, operation, cargo and delay
Mitigation	Movement, drying, cooling, repacking and notice after the incident	Response record, photographs and instructions	Separate the original cause from later aggravation
Notice and explanation	Timing, content and alternatives communicated	Email, system notice and meeting record	Separate operational liability from communication responsibility

Weather evidence may establish the existence and severity of heavy weather. It does not alone determine whether the carrier is liable or exempt.

Relationship with General Average

Where an extraordinary sacrifice or expenditure is reasonably made to preserve the vessel and cargo from a common peril during heavy weather or another marine casualty, a general-average issue may arise.

A typhoon encounter, vessel delay or cargo damage does not by itself constitute general average.

Situation	Possible General-Average Issue	Information to Confirm	Initial Action
Ordinary weather routing	May remain an ordinary operating expense	Peril, decision, expenditure and declaration	Confirm whether general average has been declared
Entry into a port of refuge	Refuge expenses may raise a general-average issue	Reason, repairs, stay and expenditure	Review the shipping line and insurer's instructions
Towage to save vessel and cargo	Salvage or general average may be relevant	Salvage agreement, peril, cost and declaration	Confirm any guarantee or security requirement
Cargo jettison or sacrifice	May be a sacrifice for common safety	Reason, cargo, master's decision and common peril	Notify the insurer immediately
Vessel delay alone	Delay alone normally does not establish general average	Extraordinary sacrifice, expenditure and declaration	Do not confuse delay management with general average

Temperature-Controlled Cargo

Review Item	Information to Confirm	Weather-Delay Risk	Record to Preserve
Set point	Booking instruction and actual reefer setting	Incorrect setting or instruction conflict	Booking, temperature instruction and setting
PTI	Pre-trip inspection and equipment operation	Equipment failure during extended operation	PTI record and equipment number
Power connection	Connection at yard, transshipment port, vessel and warehouse	Power loss, delayed connection or insufficient backup	Connection and disconnection time
Temperature record	Supply air, return air and cargo temperature	Deviation duration, recovery and quality effect	Raw download and data logger
Alarm	Alarm type, occurrence and response	Aggravation caused by delayed response	Alarm and response history
Yard dwell	Dwell at transshipment and discharge ports	Long power use, fuel and monitoring shortage	Receipt, transfer, pickup and power period
Cargo quality	Loading temperature, expiry and permitted range	Combined delay and inherent-cargo characteristics	Inspection, production, shipment and expert evidence

A temperature deviation does not necessarily result solely from delay. Loading temperature, setting, equipment, power, air circulation, stowage and inherent cargo characteristics should also be reviewed.

Evidence to Preserve After an Incident

Evidence	Main Content	Purpose	Caution
Weather warning and forecast	Issue time, sea area, wind, waves and storm surge	Objective weather conditions at the relevant time	Preserve contemporaneous rather than only later information
Port and terminal notice	Closure, suspension, reopening and gate restriction	Period during which work was impossible	Preserve issue and cancellation times
Shipping line or NVOCC notice	Slowdown, deviation, delay, omission and alternative	Effect on the vessel and individual booking	Preserve receipt and onward-communication times
Vessel movement	Position, speed, track, arrival and departure	Actual progress of the voyage	State the review time
Booking and B/L	Contract, route, parties and terms	Contractual relationship and transport stage	Separate House B/L and Master B/L
EIR and movement records	Container condition, time and location	Probable damage stage and external condition	Review damage codes and remarks
Photographs and video	Cargo, packaging, container, flooding and temperature display	Preservation of the damage condition	Record before and after movement or unpacking
Temperature and power records	Set point, actual temperature, alarm and power	Duration and cause of temperature deviation	Preserve raw data and export settings
Inspection and survey report	Cause, scope, quantity and recommended action	Insurance, recovery and quantum	Provide an inspection opportunity before disposal
Cost documents	Quotation, invoice, approval and payment	Additional costs and quantum	Connect necessity and cause
Communication record	Notice, instruction, response and approval	Initial response, responsibility and mitigation	Record telephone communications with time and participants

Cases That Commonly Cause Operational Problems

Case	Main Issue	Documents to Check	Decision Point	Initial Response
A vessel delay is assumed from a typhoon forecast alone	Confusion between forecast and individual operation	Typhoon, vessel movement and shipping line notice	Whether the booking is actually affected	Request booking-specific confirmation
Normal operations are assumed immediately after the weather improves	Port backlog is overlooked	Berth, handling, gates and vehicles	Whether the backlog has cleared	Confirm recovery at each operation
Every cost is treated as force majeure	Cost and liability are decided together	Contract, cost item, instruction and notice	Where and why each cost arose	Review each cost separately
Cargo is damaged after heavy weather	Combined weather, packaging and securing issues	Weather, packaging, securing, photographs and survey	Contribution of each possible cause	Preserve the condition and notify parties
Cargo stored in a CY is flooded by storm surge	Storage, flood protection and transport stage	Tide, location, EIR and photographs	Whose custody applied at the time	Move the cargo safely and mitigate further damage
A reefer container remains at a transshipment port	Power, temperature and monitoring	Temperature, power, alarm and transfer history	Whether the cause is delay, equipment or operation	Secure power and arrange expert review
The carrier relies on a heavy-weather exemption	Whether the defence automatically applies	Weather, voyage, equipment, stowage and terms	Severity and carrier measures	Collect evidence without admitting liability
The customer receives only a one-line weather-delay notice	Affected operation and outlook remain unclear	Notice, inquiry and workflow	Where and what operation is stopped	Reissue an operational explanation
Weather evidence is requested only after the incident	Contemporaneous information is missing	Saved notice, warning history and communications	Whether the incident-time information can be reconstructed	Introduce contemporaneous evidence-preservation procedures
Quality deterioration is claimed as a total loss	Delay, inherent vice, physical event and quantum are mixed	Temperature, inspection, market value and policy	Causal relationship and actual loss	Obtain expert causation and valuation evidence

Freight Forwarder Involvement

The five classifications used in this article are not established by law or industry-wide consensus. They serve as an analytical framework within this series to clarify the scope of freight forwarder involvement.

Classification	Main Weather-Risk Involvement	Typical Responsibility Review	Key Documents and Facts	Caution
Simple Intermediary	Communicates weather-effect information received from a shipping line, NVOCC, port or terminal	Whether entrusted inquiry and communication were accurate and timely	Receipt time, inquiry, transmission and response	This role does not itself guarantee the forecast, vessel operation, cargo condition or delivery date
Cargo Transportation Service Provider	Reschedules collection, CY delivery, storage, customs, pickup or delivery within the contracted segment	Scope of contracted transport and related operations	Quotation, transport contract, vehicle, storage, suspension and instruction	Separate vessel operation from domestic-transport response
NVOCC / House B/L Issuer	Manages route, delay notice, alternative transport and delivery as the carrier under the House B/L	Notice, carriage and contractual obligations as the Contracting Carrier	House B/L, terms, Master Booking, vessel and port notice and alternative	Distinguish the Actual Carrier's operational decision from the NVOCC's contractual responsibility
Door-to-Door Single Contractor	Integrates collection, export, ocean carriage, import, storage, delivery and final receipt	Contracted segments, cargo management and alternative response	Integrated contract, workflow, temperature, storage, changes and cost approval	Contractual status may remain even where physical operations are subcontracted
Agent / Coordinator for Specific Operations	Coordinates specified booking, port inquiry, customs, storage, incident notice or delivery operation	Specific entrusted tasks and reporting obligations	Work instruction, email, inquiry, incident record and response	Responsibility for a specified task does not automatically extend to the entire transport or insurance decision

Contractual status, the actual scope of entrusted work, physical operations, business attributes, names appearing on transport documents, insurance status, applicable terms and mandatory law must be examined separately from the Standard Five Classifications. These matters do not constitute a sixth classification or any additional classification.

It is necessary to identify who is the Contracting Carrier, who is the Actual Carrier, who obtained the booking, who reviewed weather, port and vessel information, who arranged CY delivery, customs, storage, reefer power, pickup and delivery, who received the incident notice and who approved the alternative measure.

It is also necessary to determine whether the freight forwarder only communicated a notice received from the shipping line, had contractual authority to select a route or alternative transport, or was entrusted with D/O, pickup, storage, delivery or insurance notification.

Responsibility cannot be determined solely from a party's description as a shipping line, NVOCC, prime freight forwarder, overseas agent or customs broker. The contract, transport documents, applicable terms, entrusted work, notice timing and response after the incident became known must be reviewed.

Information to Share with the Shipper, Cargo Owner and Other Parties

Party	Information to Share	Decision Required by That Party	Communication Caution
Shipper	Vessel, port, weather effect, CY cut-off, loading outlook and alternatives	Cargo preparation, earlier delivery, next vessel, alternative port and cost approval	Separate weather forecast from confirmed operational change
Cargo owner	Revised ETA, berthing, handling, pickup, cargo status and delivery outlook	Inventory, sales, production, storage and receipt	Do not confuse weather improvement with cargo availability
Shipping line or NVOCC	Booking, B/L, container, weather effect and specific questions	Vessel operation, alternative port, connection, cargo status and notice	Request cargo-specific information
Customs broker	Vessel, terminal availability, port suspension, inspection and documents	Declaration, amendment, inspection and permission	Update planned and actual information
Warehouse or terminal	Weather effect, suspension, cargo condition, storage and power	Reopening, storage, movement and mitigation	Preserve records rather than relying only on oral information
Delivery provider	Road, gate, cargo availability, waiting and receiving conditions	Vehicle, route, waiting and cancellation	Do not arrange vehicles solely from an unconfirmed reopening time
Insurer or surveyor	Weather, damage, discovery time, photographs, temperature and transport stage	Claim notice, survey, mitigation and coverage review	State whether the issue is delay alone or physical damage
Delivery location	Reason, provisional delivery outlook, cargo condition and next update	Receiving slot, labour, equipment, production and storage	Do not communicate unresolved information as a delivery commitment

Common Misunderstandings

Misunderstanding	Actual Approach	Practical Caution
Every vessel is delayed when a typhoon develops	The effect depends on route, position, port and operational decision	Review the individual vessel and booking
A marine warning automatically closes the port	The port and terminal make separate operational decisions	Confirm the official suspension and reopening notice
Normal operation resumes immediately after the weather improves	Vessel, container and vehicle backlogs may remain	Confirm handling, gates and delivery recovery
The carrier is always exempt where heavy weather exists	Severity, contract, equipment, stowage, lashing and response must be reviewed	Do not determine liability from weather alone
Every heavy-weather loss is covered by marine cargo insurance	Coverage depends on policy terms, cause, loss and cargo characteristics	Separate delay from physical damage
Quality deterioration after delay is always physical damage	Natural deterioration, inherent vice, temperature accident and delay must be distinguished	Review temperature, inspection and cargo evidence
A shipping line delay notice establishes the cargo-damage cause	The notice shows operational effect, not necessarily cargo causation	Combine weather, cargo and handling records
Weather evidence can be collected later	Contemporaneous displays and notices may be difficult to retrieve	Preserve them at the time of the event
“Bad weather” is a sufficient customer explanation	The affected port, operation, cargo status and outlook should be stated	Separate confirmed and unresolved information
All weather costs are payable either by the customer or the carrier	Allocation depends on the contract, cost item, instruction, cause and mitigation	Separate cost occurrence from recoverability

Example 1: Heavy-Weather Defence and Inadequate Securing

Assume that industrial machinery is imported from East Asia to Yokohama. A developing low-pressure system and high waves affect the voyage, and the machinery is found overturned inside its wooden case at destination.

The shipping line states that the vessel encountered severe heavy weather and refers to possible perils-of-the-sea or force-majeure defences.

The cargo owner is then advised that the internal bolts and cushioning may have been insufficient. It remains unclear whether the damage resulted primarily from weather, packaging or cargo securing.

The estimated machinery repair cost is JPY 4.2 million, with domestic movement and reinstallation estimated at JPY 800,000.

The existence of heavy weather does not establish either carrier exemption or packaging responsibility.

The marine warning, waves, vessel route and voyage record should be reviewed together with the case design, bolts, cushioning, internal securing, EIR, arrival photographs and survey report.

If the packaging could not withstand ordinary transport, the heavy weather may have exposed an existing packaging deficiency. If appropriate packaging and exceptional sea conditions are established, a different liability analysis may apply.

The freight forwarder should not admit liability, should notify the relevant parties and should preserve the opportunity for inspection before repair or movement.

Example 2: Typhoon Delay, Reefer Dwell and Temperature Deviation

Assume that frozen food is imported to Japan through Singapore. A typhoon causes suspension of terminal operations at the transshipment port, and connection to the next vessel is delayed by four days.

The reefer set point is minus 18 degrees Celsius, but the temperature record temporarily rises to minus 10 degrees during the transshipment dwell.

The cargo owner asserts that the entire cargo is unfit because of the typhoon delay and requests an insurance claim for the full invoice value of JPY 9 million.

However, the record shows several short temperature increases followed by recovery. The cargo-core temperature, loading temperature, power record and alarm response remain unconfirmed.

The typhoon delay and a total loss must be examined separately.

The PTI, set point, supply air, return air, power connection, alarm, yard position, cargo-core temperature, inspection and expert quality assessment should be reviewed.

Where some cargo may remain usable, segregation and loss mitigation should be considered before disposal. The freight forwarder should notify the insurer, carrier, transshipment agent and surveyor promptly.

Example 3: Storm-Surge Flooding in a Container Yard

Assume that a laden export container is delivered to a regional CY and the yard is partly flooded by storm surge during a typhoon.

Water enters through the lower part of the container, and rust and wet damage are found at destination. The estimated cargo loss is JPY 2.6 million.

The shipping line explains that the loss resulted from a natural disaster. The shipper argues that the terminal should have moved the container to a higher or safer area because a storm-surge forecast had been issued.

The freight forwarder should review the storm-surge information, port and terminal suspension notice, CY delivery time, yard position, flood extent, EIR, container doors and floor and damage photographs.

Even where the storm surge was unavoidable, the available protective measures, feasibility of moving the container and treatment of other containers in the same yard may be relevant.

If the container had a pre-existing hole or defective door seal, both the storm surge and the container condition may have contributed to the damage.

The freight forwarder should not immediately characterize the loss as either natural disaster or terminal fault. It should notify the insurer, carrier, terminal and surveyor and preserve contemporaneous evidence.

When to Consult a Maritime Lawyer

Routine weather review, schedule amendment or delivery rescheduling may not require immediate legal advice. Consultation with a lawyer experienced in maritime transport and cargo insurance should nevertheless be considered in the following situations:

• The carrier relies on heavy weather, perils of the sea or force majeure as a defence
• The severity, foreseeability, weather routing or navigational decision is disputed
• Seaworthiness, hatch condition, reefer equipment, container equipment or vessel management is disputed
• Vessel stowage, lashing, cargo securing or packaging responsibility is complex
• A substantial wet-damage, cargo-shifting, temperature, storm-surge or container-loss claim arises
• The responsibilities of the shipping line, NVOCC, prime freight forwarder, overseas agent, terminal, warehouse, shipper or cargo owner are complex
• The insurer raises delay, inherent vice, natural deterioration, temperature management or an exclusion
• General average or salvage costs are declared or demanded
• A claim-notice deadline, objection period or time bar is approaching
• A party requests an admission of liability, indemnity agreement, guarantee, settlement or waiver

The B/L, booking, applicable terms, weather warning and forecast, port notice, vessel movement, voyage and handling records, EIR, photographs, temperature and power records, packaging and securing evidence, survey report, additional costs and communications should be arranged chronologically.

Decision Checklist

Review Stage	Party or Source	Point to Confirm	Action if a Problem Exists
Quotation and route proposal	Shipping line, NVOCC and official weather information	Season, route, direct or transshipment service and cargo characteristics	Review buffer time, alternative route and additional conditions
Booking	Shipping line or NVOCC	Vessel, route, ETD, ETA, transshipment and weather outlook	Explain that the schedule remains planned information
Before CY or CFS delivery	Terminal, warehouse, delivery provider and weather source	Wind, storm surge, rain, road, gate and deadline	Advance, postpone or change the storage arrangement
Before departure	Shipping line, port and terminal	Port closure, handling, ETD, CY cut-off and actual loading	Review the next vessel, alternative port, rollover and documents
During voyage	Weather information, shipping line and vessel tracking	Typhoon, marine warning, waves, position, speed and revised ETA	Update the rotation, deviation, port omission and later plan
During transshipment	Shipping line, NVOCC, overseas agent and terminal	Weather, handling, cargo location, connection and reefer power	Review the next vessel, route and cargo protection
Before arrival	Shipping line, port, terminal and customs broker	Port entry, berthing, handling, storm surge, gates and pickup	Provisionally update customs, vehicle and delivery
After weather improvement	Port, terminal and delivery provider	Handling backlog, gates, appointments, vehicles and roads	Reconfirm each operation rather than assuming recovery
When cargo damage is found	Carrier, NVOCC, insurer and surveyor	Damage, cause, photographs, packaging, container and weather	Preserve the condition, notify parties and mitigate loss
When temperature deviation occurs	Shipping line, terminal, insurer and expert	Set point, PTI, power, temperature, alarm and quality	Secure power, inspect, survey and segregate
When additional costs arise	Contractual counterparty, service provider and shipper or cargo owner	Cost item, cause, amount, instruction, approval and mitigation	Preserve quotations, approvals and evidence
When insurance is reviewed	Insurer, insurance intermediary and surveyor	Policy, cause, transport stage and type of loss	Notify delay and physical damage separately
When a liability dispute arises	Contractual counterparty, insurer and maritime lawyer	Status, terms, weather, operation, packaging, loss and deadlines	Do not admit liability immediately; preserve the records

Summary

Weather information and maritime transport risk is not merely the review of a weather forecast. It is the operational use of typhoon, low pressure, wind, waves, storm surge, fog and related information in vessel, port, terminal, cargo, insurance and liability management.

Meteorological warnings and forecasts, port and terminal notices, shipping line or NVOCC communications, vessel movement and cargo-specific records have different functions.

Weather information is important evidence of the existence and severity of weather conditions. It does not alone establish the cause of individual delay, cargo damage, carrier exemption or insurance coverage.

Where heavy weather occurs, the parties should determine whether the vessel is at sea, waiting for port entry or berthing, affected by handling suspension, or delayed at the CY, CFS, gate, customs or delivery stage.

Operational effects may remain after the weather improves because of backlogs involving vessels, containers, vehicles and warehouses. Revised ETD and ETA should therefore be reviewed together with handling, terminal availability, pickup, connection and delivery.

Where cargo damage is suspected, delay, physical damage, natural deterioration, inherent vice, packaging, securing, equipment and temperature management should be separated.

Official weather material, port and terminal notices, vessel movement, B/L, EIR, photographs, temperature and power records, inspection and communications should be preserved promptly.

The responsibility of a freight forwarder cannot be determined solely from its involvement with weather or delay information. Its status as the Contracting Carrier or Actual Carrier, its position under the Standard Five Classifications, the actual scope of entrusted work, review and notice times, transport documents, applicable terms and response after the incident became known must be examined separately.

The existence of weather-related loss or additional cost and the right to recover it from the shipping line, NVOCC, freight forwarder, shipper, cargo owner, terminal or another party are separate issues.