What Is a Sea Cargo Charter? Types, Clauses, and Liability

A sea cargo charter is a contract in which a shipowner rents out an entire vessel, or a defined portion of its cargo space, to a charterer for carrying goods by sea. These agreements govern bulk commodities and raw materials moving across international waters, and they allocate everything from who pays for fuel to who bears the risk of delays. Freight on a single dry bulk voyage can run into hundreds of thousands of dollars, so the clauses inside the contract carry more weight than in most commercial agreements.

Three structures dominate the market, and each one shifts control and cost between the parties in a different way. The clauses layered on top — freight, laytime, off-hire, liens — decide where the money actually lands when a voyage goes sideways.

The Three Types of Charter

Charter parties fall into three main categories. The choice determines who runs the ship, who pays what, and who absorbs the delay.

Voyage Charter

A voyage charter covers a single trip from one port to another with a specific cargo. The shipowner keeps full control of the crew and vessel operations. The charterer pays freight based on the quantity of cargo loaded, usually calculated per metric ton. Because the shipowner manages the ship, the risk of voyage delays — bad weather, port congestion, mechanical trouble — sits primarily on the shipowner’s side. The GENCON form, most recently updated in 2022, is the dominant standard template for voyage charters.¹

Time Charter

A time charter hires the vessel for a fixed period, anywhere from a few months to several years, giving the charterer the right to direct where the ship goes. The charterer pays hire at regular intervals, typically every 15 days in advance, and covers voyage costs like fuel and port charges. The shipowner continues to employ the crew and handle technical maintenance throughout the charter period.² The NYPE 93 is a widely used standard form for dry cargo time charters.³

Bareboat (Demise) Charter

A bareboat charter transfers near-complete control to the charterer for the contract’s duration. The charterer provides their own crew, manages all maintenance, and covers every operating expense. Under a bareboat arrangement, the charterer assumes the rights and liabilities of ownership for the vessel.⁴ This is why bareboat charters often function as financing tools for long-term fleet expansion.

The Clauses That Decide Who Pays

Whatever structure the parties choose, a handful of clauses drive the financial outcome. Most chartering disputes trace back to one of them.

Freight and Hire

Freight is the payment for a voyage charter, usually calculated per metric ton of cargo loaded. Hire is the periodic rate paid during a time charter, remitted in advance at agreed intervals. Freight is typically earned on delivery of the cargo. Hire is payable continuously for the duration of the charter, whether or not the vessel is carrying cargo at any given moment, and the charterer must pay it regularly, in advance, and in full as the contract requires.⁵

Laytime, Demurrage, and Despatch

Laytime is the agreed window of time the charterer has to load and unload the vessel without additional charges beyond the freight.⁶ If loading or discharge runs past that window, the charterer owes demurrage, a daily penalty that compensates the shipowner for idle time. Demurrage rates are negotiated into the contract and typically track the vessel’s daily time charter equivalent for the voyage in question.⁷

Despatch is the mirror image. If the charterer finishes cargo operations ahead of schedule, the shipowner pays despatch money for the time saved. The despatch rate is usually half the demurrage rate, though the parties can negotiate differently. Despatch is common in dry cargo shipping and rarely appears in tanker or gas charter parties.⁷

Deadfreight

When a charterer commits to filling a vessel but fails to provide the promised quantity of cargo, the shipowner can claim deadfreight — damages for the unused space. The charterer’s obligation to supply cargo is absolute and cannot be delegated. A deadfreight claim arises whenever the actual cargo falls short of the contractual quantity.⁸

Off-Hire

In a time charter, the off-hire clause defines when hire payments stop because the vessel cannot perform. The core principle is simple: if the ship is not in full working order to provide the service required, and the charterer loses time as a result, hire is not payable for that lost time. Fault is not required. An unforeseeable engine breakdown or unavoidable collision damage can trigger off-hire.⁹

The limits cut both ways. Charterers cannot place a vessel off-hire when the problem stems from their own actions, such as supplying improper fuel, poor stowage, or loading unlawful cargo. Loss of time that flows naturally from the charterer’s own orders, like hull fouling from trading in warm waters the charterer chose, typically does not qualify either.⁹

Arranging the Charter

Before negotiations begin, the charterer needs precise details that will shape every term in the fixture.

Cargo and Hazardous Goods

The starting point is the cargo itself: total weight in metric tons, cubic volume, and any special handling requirements. If the cargo falls under the International Maritime Dangerous Goods Code, the charterer must declare it upfront so the shipowner can confirm the vessel carries the required safety certifications and segregation capabilities.¹⁰ Misstating or omitting hazardous cargo information can void insurance coverage and expose the charterer to serious liability.

Laycan and Port Requirements

The laycan sets the earliest and latest dates the vessel must arrive at the loading port. If the vessel misses the cancelling date, the charterer typically has the right to cancel the charter entirely. GENCON 2022, for example, gives the charterer 48 hours after the cancelling date to exercise cancellation if the vessel has not tendered its readiness notice.¹ Port restrictions, like maximum draft, berth length, and crane availability, determine whether the charterer needs a geared vessel with its own lifting equipment or a gearless ship that relies on shore cranes.

Notice of Readiness

Once the vessel arrives, it must tender a Notice of Readiness (NOR) to formally signal that laytime can begin. For the NOR to be valid, the vessel must have physically arrived within the port limits or designated waiting area; the vessel must be both physically and legally ready to handle cargo, with clean holds, functioning equipment, and customs clearance complete; and the notice must be properly served on the correct parties in the form the charter party requires.¹¹ An invalid NOR does not start the laytime clock, which gives the charterer free time at the shipowner’s expense.

The Fixture and Subjects

Brokers acting for owners and charterers exchange terms on key commercial points: freight or hire rate, laycan dates, cargo quantity, loading and discharge ports. Once the main terms are agreed, the parties typically attach conditions called “subjects” that must be resolved before the deal is binding. Common subjects include:

Subject stem, which gives the charterer time to confirm with the shipper that enough cargo will be available on the agreed dates. The term originally stood for “Subject To Enough Merchandise.”¹²
Subject shipper’s or receiver’s approval, which requires the cargo owner or receiver to approve the nominated vessel.
Subject board approval, used mainly in long-term period charters where the principal’s board must sign off. This one carries risk, because approval can be refused without explanation.¹²

Jurisdictions treat “subject details” differently. Under English law, the expression prevents a binding contract until the subject is removed. Under New York law, a binding fixture may result once the main terms are agreed, even while details remain open; if the parties cannot settle the details, a tribunal decides them.¹² Parties who assume the two systems work the same way get caught out.

Once all subjects are lifted, the broker prepares a recap: a detailed summary of every agreed point that serves as a binding record. The parties review the recap, confirm accuracy, and then execute the formal charter party document.

Bills of Lading and Third-Party Cargo

A charter party governs the relationship between shipowner and charterer, but the bill of lading is the document that matters once cargo changes hands. When the charterer is also the shipper, the charter party controls, and issuing a bill of lading to the charterer does not override its terms. The complexity arrives when the bill of lading transfers to a third party, such as a buyer taking delivery at the discharge port. At that point the bill of lading becomes the governing contract between carrier and holder, and the charter party terms are irrelevant unless the bill of lading specifically incorporates them.

Courts scrutinize incorporation clauses carefully. A general reference like “all terms and conditions of the charter party are incorporated” often fails to bring in unusual clauses, such as arbitration requirements or liability limitations, that a third-party cargo receiver would not reasonably expect. If a lien clause is not properly incorporated into the bill of lading, the shipowner may lose the right to hold third-party cargo for unpaid freight.

Insurance and Liability Limits

Maritime insurance for chartered vessels splits into layers, and the gaps are where expensive surprises hide.

Charterers’ P&I Cover

Protection and Indemnity (P&I) clubs provide liability insurance covering risks that standard hull policies exclude. A charterer’s P&I entry typically covers the same liability risks as a shipowner’s — cargo damage claims, pollution, personal injury — plus liability to indemnify the vessel owner for those same risks. It also covers damage to the vessel’s hull caused by the charterer, including loss of use, and the charterer’s contribution to general average and salvage for property like bunkers and containers placed aboard.¹³

Standard P&I limits for charterers run up to $500 million per incident per vessel, with war risk coverage carrying a sub-limit of $100 million. Higher limits up to $1 billion are available on request.¹³ Charterers who also own the cargo should confirm their entry covers cargo owner pollution liability, which is a separate risk from operational liability.

COGSA Package Limits

Under the Carriage of Goods by Sea Act, the carrier’s liability for cargo loss or damage is capped at $500 per package, or $500 per customary freight unit for unpackaged goods, unless the shipper declares the cargo’s nature and value before shipment and that declaration appears in the bill of lading. The carrier and shipper can agree to a higher maximum but never lower than $500. The carrier escapes liability entirely if the shipper knowingly misstated the cargo’s nature or value in the bill of lading.¹⁴ These limits apply during the “tackle-to-tackle” period, from loading onto the vessel to discharge, so cargo damage on the dock before loading or after discharge falls outside COGSA.

When Payment Goes Wrong

Charter party disputes rarely end up in court. Standard forms typically specify London or New York as the arbitration seat, and the choice carries procedural consequences.

London arbitration runs under the London Maritime Arbitrators Association (LMAA) Terms. The LMAA is not an administering institution; it provides the procedural framework arbitrators follow.¹⁵ GENCON 2022 defaults to London and includes tiered procedures: claims under $100,000 follow the LMAA Small Claims Procedure, claims between $100,000 and $400,000 can use the Intermediate Claims Procedure, and larger claims go through full arbitration.¹ New York arbitration runs through the Society of Maritime Arbitrators (SMA), which provides more formal administrative support including its own arbitration rules, model clauses, and escrow services.¹⁶ Which seat applies depends entirely on the arbitration clause, and litigating in the wrong forum can mean starting over.

Liens on Cargo

A shipowner owed freight or demurrage may exercise a lien, a right to hold the cargo until the debt is paid. Under English law, this right must be contractual; the charter party must explicitly grant it. If the cargo belongs to a third-party bill of lading holder rather than the charterer, the lien clause must be properly incorporated into the bill of lading or the right is lost.¹⁷

Timing matters. The lien must generally be exercised at the discharge port, and once cargo is delivered to receivers, the lien is lost. Stopping a vessel mid-voyage to exercise a lien is not normally permitted. Shipowners bear a duty of care as bailees while holding the cargo, and an unlawful lien can expose the owner to damages for delay and loss of profit. A lien clause does not automatically grant a right to sell the cargo; that usually requires a court order even when the charter party expressly provides for sale.¹⁷

Vessel Arrest

A charterer or cargo interest with a maritime claim can seek to arrest the vessel through an in rem action. In U.S. federal courts, the vessel must be physically located within the court’s territorial jurisdiction. The court clerk issues a Warrant of Arrest, and the U.S. Marshals Service has exclusive responsibility for seizing the vessel.¹⁸ Many districts have their own local admiralty rules that add procedural requirements on top of the federal Supplemental Rules, so the specific port where the vessel sits affects more than just logistics.

Carbon Rules Now Affect Vessel Selection

Environmental regulation has reached the chartering desk. Two overlapping frameworks shape how vessels are chosen and how charter parties are drafted.

The Sea Cargo Charter provides a voluntary global framework for measuring whether chartering activities align with international decarbonization goals.¹⁹ Signatories measure voyage emissions annually using the Energy Efficiency Operational Indicator (EEOI), which combines fuel consumption, emission factors by fuel type, distance, and cargo quantity.²⁰ Signatories commit to making Sea Cargo Charter compliance contractual in new chartering activities, so shipowners dealing with signatories should expect to share fuel consumption and voyage data as a standard contractual obligation.

The mandatory Carbon Intensity Indicator (CII) under MARPOL Annex VI, Regulation 28, rates every applicable vessel from A (best) to E (worst) based on operational carbon intensity.²¹ A vessel rated D for three consecutive years, or E for a single year, must develop a corrective action plan and submit a revised Ship Energy Efficiency Management Plan showing how it will reach a C rating or better.²² The commercial consequences already bite harder than the regulatory ones. Major charterers are specifying minimum CII ratings in their contracts, some refuse D- or E-rated tonnage outright, and vessels with poor ratings may face rate discounts and reduced resale value. By 2026 the threshold for a C rating is roughly 11% stricter than the 2019 baseline, meaning a vessel with no efficiency improvements will likely drift from C into D, which makes CII ratings a due diligence priority when selecting tonnage.

1
BIMCO. GENCON 2022
2
U.S. Securities and Exchange Commission. Exhibit 10.12 – Time Charter Party
3
BIMCO. NYPE 93
4
United States Coast Guard. Navigation and Vessel Inspection Circular 7-94
5
BIMCO. Non-Payment of Hire Clause for Time Charter Parties 2006
6
BIMCO. Laytime Definitions for Charter Parties 2013
7
Trans-Lex.org. Principle X.1 – Laytime, Demurrage, Detention and Despatch in Sea Transport
8
The West of England Ship Owners Mutual Insurance Association (Luxembourg). Nutshell on Deadfreight
9
Steamship Mutual. Off-Hire: FAQs
10
International Maritime Organization. The International Maritime Dangerous Goods (IMDG) Code
11
lmitac.com. Notice of Readiness: Timing, Legal Implications, and Best Practices
12
The Baltic Exchange. Chartering Negotiations
13
West P&I Club. Charterers and Traders
14
Office of the Law Revision Counsel. 46 USC 30701
15
LMAA. About LMAA
16
Society of Maritime Arbitrators, Inc. Society of Maritime Arbitrators
17
The West of England Ship Owners Mutual Insurance Association. Defence Guide: Liens on Cargo
18
U.S. Marshals Service. Admiralty
19
Sea Cargo Charter. Sea Cargo Charter
20
Sea Cargo Charter. Assessment of Climate Alignment
21
International Maritime Organization. EEXI and CII – Ship Carbon Intensity and Rating System
22
imorules.com. Regulation 28 – Operational Carbon Intensity