Ship Chartering Explained: Voyage, Time, Bareboat and COA

The decision behind every charter

A charter structure answers four practical questions: what transport capacity is required, for how long, who directs the vessel's commercial employment and which party bears each category of cost. The contract then translates those choices into obligations, warranties, exceptions and remedies.

No structure is automatically better. A single cargo movement, a programme of repeated liftings and long-term control of a vessel require different allocations of risk and flexibility.

Voyage charter

Under a voyage charter, the owner agrees to carry an identified cargo between agreed ports. Payment is normally freight, often expressed as a lump sum or rate per tonne. The owner manages the vessel and typically bears vessel operating and voyage costs, subject to the contract.

The commercial focus is the defined movement: cargo quantity, loading and discharge ranges, laycan, freight, laytime, demurrage, cargo handling responsibilities and port restrictions. Voyage charters suit one-off shipments and cargo programmes where each voyage can be fixed separately.

Time charter

A time charter gives the charterer commercial use of the vessel for an agreed period or trip while the owner retains possession, crewing and technical management. The charterer pays hire and gives employment instructions within the contract's trading limits.

Cost allocation differs from a voyage charter. Charterers commonly take responsibility for voyage-related items such as bunkers and port expenses, while owners retain vessel operating costs. Performance warranties, off-hire, delivery, redelivery and safe-port obligations become central.

Bareboat charter

A bareboat or demise charter transfers possession and operational control for an agreed period. The charterer usually takes on crewing, technical operation, maintenance and many ownership-like responsibilities, while legal title remains with the owner.

Because the allocation is extensive, bareboat arrangements require careful due diligence on technical capability, insurance, finance, class, flag and redelivery. They are materially different from hiring carrying capacity for a voyage.

Contract of affreightment

A contract of affreightment, or COA, commits one party to carry an agreed quantity over a series of shipments during a period. It can give a cargo programme dependable capacity without tying every lifting to one named vessel, subject to the terms.

The agreement needs clear rules for scheduling, nomination, acceptable vessels, quantity tolerance, freight adjustment and failure to provide cargo or tonnage. The parties still issue voyage instructions and often use an agreed voyage charter form for individual liftings.

A practical comparison

Choose by working backwards from the commercial objective. A defined cargo movement points toward voyage chartering. Repeated control of a vessel's employment may favour time chartering. Operational possession may call for bareboat chartering. A recurring cargo programme may suit a COA.

Before signing, test the allocation against realistic disruption: port congestion, bunker price changes, underperformance, cargo delay, sanctions screening, weather and a missed delivery window. The contract should make responsibility clear before the exception occurs.

• Voyage charter: buy transport for a defined voyage
• Time charter: buy commercial use for time or a trip
• Bareboat charter: take possession and operation
• COA: secure a programme of transport capacity