Commencement of Laytime Explained: Notice of Readiness, Port Charter, Berth Charter, and Demurrage

Commencement of Laytime

The commencement of laytime is one of the most important moments in a voyage charter party because it marks the point at which the charterer’s contractual time allowance for loading or discharging begins to run. From that moment, every hour can have a direct commercial consequence. If cargo operations are completed within the agreed laytime, no additional delay payment is due. If the agreed laytime is exceeded, the charterer may become liable for demurrage. If operations are completed more quickly than the time allowed and the charter party provides for it, the charterer may be entitled to despatch.

In practice, disputes about the start of laytime usually arise because the ship has arrived near the loading or discharging port, but one or more legal requirements for commencement have not been satisfied. The ship may be waiting outside the berth, outside port limits, without free pratique, without customs clearance, with unclean holds, with cargo inaccessible, or with a Notice of Readiness that was tendered too early or in the wrong manner. For this reason, the commencement of laytime depends not only on operational facts but also on the precise wording of the Charter Party Clauses.

Under a voyage charter party, the shipowner earns freight in return for making the ship available for the agreed voyage and for giving the charterer a defined period for cargo handling. The charterer is not required to begin loading or discharging simply because the ship is somewhere near the port. The ship must first reach the contractual destination, be ready in the required sense, and tender a valid Notice of Readiness (NOR) if the charter party requires one. Only after these conditions, and after any agreed notice or preparation period has expired, will laytime normally begin.

For laytime to commence under a voyage charter party, four main requirements usually need to be satisfied:

1. Arrival at the agreed destination – the ship must reach the port, berth, dock, anchorage, waiting area, or other place required by the charter party.
2. Readiness of the ship – the ship must be physically and legally ready to load or discharge the cargo.
3. Valid Notice of Readiness (NOR) – the ship must tender a notice that correctly states that the ship has arrived and is ready.
4. Expiry of the agreed notice period – any contractual waiting time after NOR, such as six hours, 12 hours, or a GENCON-style time rule, must pass unless cargo operations start earlier under the charter party.

Arrival at the Agreed Destination

The first requirement is that the ship must have arrived at the contractual destination. This is often the most difficult question because the agreed destination is not always described in simple terms. It may be a named port, a named berth, one safe berth, one safe port, a dock, a customary anchorage, an offshore terminal, a river port, or a place described by reference to a charter party form such as GENCON, ASBATANKVOY, SHELLVOY, BPVOY, or another standard form.

The agreed destination determines when the approach voyage ends and when the ship may become an Arrived Ship. The answer depends on whether the charter party is a port charter party, a berth charter party, a dock charter party, or a contract with special wording that modifies the common law position.

Port Charter Party

In a port charter party, the named port is the agreed destination. If the berth is immediately available and the ship proceeds directly to berth, the practical difficulty is usually limited because the ship will be both inside the port and at the cargo-handling place. However, disputes become common when the berth is not available and the ship waits at anchorage.

The leading authority is The Johanna Oldendorff. In that case, the House of Lords explained that a ship under a port charter party becomes an Arrived Ship when she is within the port and at the immediate and effective disposition of the charterer. If she is at the place where waiting ships usually lie, she will normally satisfy that requirement unless there are unusual circumstances. If she is waiting at another place within the port, the shipowner must prove that the ship is as fully available to the charterer as she would have been at the usual waiting place or near the berth.

This principle is commercially important because a ship may be unable to berth because of congestion, weather, tide, tugs, pilots, berth occupancy, or port operating restrictions. Under a port charter party, once the ship has reached the proper waiting place within the port and is ready, the risk of ordinary berth delay is generally transferred to the charterer, subject always to the wording of the charter party.

The phrase “within the port” has caused considerable debate. In some ports, the legal, fiscal, administrative, pilotage, and commercial limits are not identical. In other ports, the usual anchorage may be many miles from the berth. Where national or local law clearly defines the port limits, those limits may be decisive. Where there is no clear legal definition, the area over which the port authority exercises control over the movement and conduct of ships may be relevant. Admiralty charts, port regulations, and evidence of port practice may also be important.

The Maratha Envoy confirmed that if the usual waiting area is outside the legal or administrative port limits, a ship waiting there will not normally be an Arrived Ship under a port charter party. The ship may be waiting in the commercial sense, but at common law she has not reached the contractual destination unless the charter party contains wording that changes that result.

This distinction can have serious financial consequences. If a ship is ordered to wait at a customary anchorage outside port limits, laytime may not begin unless the charter party contains clauses such as WIPON, WIBON, a waiting-for-berth provision, or other wording allowing NOR to be tendered outside strict port limits. Without such wording, the shipowner may bear the cost of waiting even though the delay is caused by congestion at the charterer’s loading or discharging port.

The point was also illustrated in The Agamemnon, where a Notice of Readiness tendered at South West Pass for a ship bound to Baton Rouge was held invalid. The ship had not reached the agreed destination and was not yet at the immediate and effective disposition of the charterers at the relevant port.

Berth Charter Party

In a berth charter party, the agreed destination is the berth rather than the port. The ship is not usually an Arrived Ship until she is securely at the named or nominated berth. This means that congestion, bad weather, tug shortages, pilot delays, tide restrictions, and other delays preventing the ship from reaching the berth are normally for the shipowner’s account, unless the charter party contains wording transferring that risk to the charterer.

The berth does not necessarily have to be named in the fixture recap from the outset. If the charter party provides for “1 safe berth” at a named port, the berth may become the contractual destination once nominated. The distinction between a port charter and a berth charter is sometimes difficult. In The Finix, the wording “one safe berth, London” was treated as indicating a berth charter, while “London, one safe berth” was treated as indicating a port charter. However, modern interpretation requires the whole charter party to be read together, and no single phrase should be treated mechanically without considering the commercial and contractual context.

Because a berth charter places the risk of reaching the berth on the shipowner, shipowners frequently seek protective wording such as WIBON (Whether in Berth or Not), WIPON (Whether in Port or Not), Time Lost Waiting for Berth to Count as Laytime, or equivalent clauses. These provisions can allow laytime to begin before the ship is physically berthed, provided the conditions of the clause are satisfied.

Dock Charter Party

A dock charter party is less common. In this form, the agreed destination is a dock, and the ship is generally treated as arrived when she passes through the dock gates or reaches the contractual dock area. The same general principles apply: the exact point of arrival depends on the words used by the parties and the commercial geography of the port.

WIBON, WIPON, WIFPON, WICCON, and Waiting-for-Berth Clauses

Because strict common law rules can produce commercially harsh results, charter parties often include abbreviations and special clauses designed to control the commencement of laytime. These terms should never be inserted casually. Each one allocates delay risk in a different way.

WIBON (Whether in Berth or Not)

WIBON allows a Notice of Readiness to be tendered even though the ship is not yet in berth, usually where the berth is unavailable. In a berth charter party, this can soften the strict rule that the ship must reach the berth before becoming an Arrived Ship. However, the effect of WIBON depends on the cause of the ship’s inability to berth.

In The Kyzikos, the House of Lords treated WIBON as effective only where the berth was unavailable. If the berth was available but the ship could not reach it because of another factor, such as bad weather, the wording did not necessarily permit laytime to start before berthing. This is why modern clauses often use more detailed wording to avoid uncertainty.

WIPON (Whether in Port or Not)

WIPON is used where the ship may be waiting outside port limits. It allows NOR to be tendered even if the ship is not within the legal or administrative port boundaries, provided she is at the usual waiting place or another contractually accepted waiting area. This wording is particularly important for ports where the customary anchorage is outside port limits.

Where a berth charter contains both WIBON and WIPON, the combined effect may allow a ship to tender NOR outside the berth and outside the port, if the ship is at the usual waiting place and the berth is unavailable. The exact effect depends on the full clause and the factual circumstances.

WIFPON and WICCON

WIFPON (Whether in Free Pratique or Not) and WICCON (Whether in Customs Clearance or Not) are designed to avoid delay in the validity of NOR where free pratique or customs clearance is expected to be a formality. These clauses are useful, but they are not unlimited. If there is a real health problem, an actual customs obstacle, or a non-formal clearance issue preventing cargo operations, the ship may still not be legally ready despite the clause.

Time Lost Waiting for Berth to Count

Some charter parties provide that time lost waiting for berth shall count as loading or discharging time, or as laytime. Such wording can be particularly valuable where the ship cannot validly tender NOR at the waiting place. The clause may transfer the economic risk of berth congestion to the charterer even though laytime has not technically commenced in the ordinary way. However, these clauses require close drafting because they can operate differently from a standard laytime clause.

Reachable on Arrival and Always Accessible

The phrase reachable on arrival is especially important in tanker chartering and is closely associated with ASBATANKVOY. A berth that is reachable on arrival must be available to the ship when she arrives, so that the ship can proceed to it without delay. If the berth is not reachable because of congestion, weather, strike, lack of tugs, tidal restrictions, or another cause within the commercial risk assumed by the charterer, the shipowner may have a claim for damages.

Cases such as The Laura Prima, The Sea Queen, and The Fjordaas show that reachable-on-arrival wording can impose a strong obligation on charterers. The clause may operate independently of laytime and demurrage. Therefore, a shipowner may claim damages for detention or other loss where the ship is prevented from reaching a berth that should have been reachable on arrival.

Because of the severity of this obligation, many charterers seek to amend or delete the phrase, or to use weather clauses, congestion clauses, or split-risk provisions. Oil major forms often contain more detailed clauses dealing with accessibility, waiting areas, berthing delay, weather, free pratique, gangway arrangements, and the time at which NOR becomes effective.

GENCON and the Commencement of Laytime

GENCON-style wording commonly provides a detailed rule for when laytime starts after NOR. Under GENCON 94, laytime for loading and discharging generally commences at 13:00 hours if NOR is given up to and including 12:00 hours, and at 06:00 hours on the next working day if NOR is given during office hours after 12:00 hours. The cargo is normally to be loaded and discharged within the agreed running days or hours, subject to weather, Sundays and holidays, and any “unless used” wording.

Clause 6(c) of GENCON 94 also contains wording addressing the position where the loading or discharging berth is unavailable on the ship’s arrival at or off the port. In that situation, the ship may be entitled to tender NOR within ordinary office hours on arrival, and laytime or time on demurrage may count as if the ship were in berth, provided the master warrants that the ship is ready in all respects. Time spent moving from the waiting place to the berth may be excluded, depending on the form and any amendments.

GENCON clauses are frequently amended in fixtures. Some trades use a “2 p.m./8 a.m.” notice regime instead of the printed “13:00/06:00” wording. Therefore, brokers, operators, masters, agents, and claims handlers should always check the actual recap and rider clauses rather than relying on the printed form alone.

ASBATANKVOY and Tanker Laytime Commencement

Tanker charter parties tend to define laytime commencement more precisely than many dry cargo forms. Under the traditional ASBATANKVOY clause, the master or agent gives NOR upon arrival at the customary anchorage of each loading or discharging port. Laytime then normally begins six hours after the NOR is received, or when the ship arrives in berth, whichever occurs first.

The expression customary anchorage has produced disputes. Traditionally, it was interpreted strictly. A ship not at the customary anchorage could be unable to tender valid NOR. However, arbitration decisions have sometimes taken a more practical approach where port procedures make strict movement to the anchorage commercially unrealistic, especially if instructions are given at an entry buoy or where security risks make anchoring at the usual place unsafe.

Even so, shipowners should be careful. A master should not assume that a Notice of Readiness tendered away from the customary anchorage will be valid unless the charter party wording, port practice, and surrounding facts support that conclusion. Where in doubt, it is often prudent to tender additional NORs without prejudice when the ship reaches each potentially relevant point.

Readiness of the Ship

The second requirement for laytime commencement is readiness. The ship must be ready in all material respects to load or discharge the cargo. Readiness has both a physical and a legal dimension. A ship may have arrived at the proper place but still be unable to tender valid NOR if she is not actually ready.

Physical Readiness

Physical readiness means that the ship, holds, tanks, hatches, cranes, gear, pumps, pipelines, ballast systems, and other relevant equipment must be in a condition that allows cargo operations to begin when required. The ship does not necessarily have to be actively working cargo at the instant NOR is tendered, but she must be capable of starting cargo operations without material delay once the charterer is ready to use her.

For dry bulk ships, hold readiness is often the most important issue. Holds must be clean, dry, free from contamination, free from infestation, odor-free where necessary, and suitable for the intended cargo. In The Tres Flores, the ship tendered NOR for a maize cargo, but the holds were later found to be infested. The Court of Appeal held that the ship was not ready, the NOR was invalid, and laytime did not begin until the ship became ready and a valid notice could be given.

The level of cleanliness required depends on the cargo and the charter party. A ship that is ready for coal may not be ready for grain. A ship that is ready for one grade of fertilizer may not be ready for another moisture-sensitive or contamination-sensitive cargo. Cargo-specific requirements, previous cargo residues, odor, rust scale, insect infestation, salt contamination, and water ingress may all be relevant.

Readiness of Equipment

If the ship’s gear is required for loading or discharging, it must be available and capable of being used when required. This includes cranes, grabs, winches, hatches, pumps, hoses, inert gas systems, heating coils, tank-cleaning equipment, and measuring systems where relevant. Equipment does not always need to be physically operating at the instant NOR is tendered, but it must be capable of being made ready without causing material delay.

In The Virginia M, the ship did not have sufficient fresh water for her boilers to operate the steam winches needed for discharge. Because the ship could not complete discharge without stopping to take water, the NOR was invalid. This illustrates that readiness is tested commercially and practically, not merely by a formal declaration from the master.

For tankers, deballasting can be particularly important. Modern segregated ballast systems generally reduce disputes because ballast and cargo systems are separated. If loading and deballasting can proceed concurrently without delaying cargo operations, the ship will usually be considered ready. If deballasting prevents loading or causes a material delay, the charter party wording and tanker form must be examined carefully.

Legal Readiness

Legal readiness means that the ship has the clearances, certificates, permissions, and documents necessary to proceed with cargo operations. These may include customs clearance, immigration clearance, health clearance, port authority approval, ISPS documentation, cargo documents, tank certificates, class documents, safety certificates, and any special permits required by the cargo or port.

Free pratique is a common source of disputes. It is the health clearance that allows the ship to communicate freely with the shore. The general principle from The Delian Spirit is that lack of free pratique will not invalidate NOR if health clearance is expected to be a mere formality and there is no reason to anticipate delay. However, if there is a real health issue, suspected disease, quarantine risk, or non-routine inspection that prevents operations, the ship may not be legally ready until free pratique is granted.

Customs clearance follows a similar approach. If customs clearance is normally a formality and there is no real impediment, the ship may still be ready. If customs clearance is refused or delayed for a substantive reason that prevents loading or discharging, readiness may not exist. Clauses such as WICCON and WIFPON may assist, but they will not normally overcome a real legal obstacle preventing cargo work.

Notice of Readiness (NOR)

The third requirement is a valid Notice of Readiness (NOR). NOR is the master’s or shipowner’s declaration that the ship has arrived at the contractual destination and is ready to load or discharge. It has two commercial functions: it informs the charterer that the ship is at the charterer’s disposal, and it starts the mechanism by which laytime may begin.

Most voyage charter parties expressly require NOR. At common law, NOR may be oral unless the charter party requires writing, but modern charter parties almost always require written notice by email, letter, telex, fax, electronic platform, agent’s message, or another specified method. The charter party may also require NOR to be tendered only during office hours, to a named party, at each loading or discharging port, after laydays commence, or after particular documents have been obtained.

A valid NOR must be accurate when tendered. It must not assert that the ship has arrived if she has not reached the contractual destination. It must not assert that the ship is ready if she is not physically or legally ready. If the notice is premature or untrue, it is generally invalid and does not automatically become valid later when the ship arrives or becomes ready.

Invalid NOR Does Not Usually Cure Itself

The principle that an invalid NOR does not automatically become valid later was confirmed in The Mexico 1. A notice that is false when tendered does not “float” in a suspended state until the facts become true. Unless the charter party provides otherwise, or the charterers waive the defect, a new valid NOR must be tendered when the ship is actually arrived and ready.

This rule can be severe. A shipowner may lose days or weeks of laytime and demurrage if no fresh NOR is given after the original notice is found invalid. Operators should therefore consider tendering additional Notices of Readiness without prejudice whenever there is doubt about the ship’s status, location, free pratique, customs clearance, cargo accessibility, or hold readiness.

Wrong Time but Correct Facts

There is an important distinction between an NOR that is factually false and an NOR that is factually correct but tendered outside the contractual time window. In The Petr Schmidt, the ship tendered NOR outside the permitted hours, but the ship was in fact arrived and ready. The notice was treated as effective when the permitted time arrived. This is different from a notice that falsely states that the ship is ready or has arrived.

Therefore, if the only defect is timing, the notice may become effective at the next permitted time if the ship remains ready. If the defect is factual readiness or arrival, a fresh notice is usually required.

Waiver of an Invalid NOR

The strict rule on invalid NOR is moderated by waiver and estoppel. In The Happy Day, the ship tendered a premature NOR under a berth charter before reaching the berth. The charterers did not reject the notice and later ordered or allowed discharge to begin. The Court of Appeal held that laytime began when discharge commenced because the charterers had waived the requirement for a fresh NOR.

The Happy Day principle generally requires three elements: the ship later becomes capable of tendering a valid NOR; the charterers know, directly or through their agents, that the ship is ready; and the charterers allow cargo operations to begin without rejecting the invalid notice or reserving rights. If these elements are present, laytime may begin at the start of cargo operations even though the earlier notice was invalid.

In The Northgate, the court went further on its facts because the terminal accepted the NOR and the charterers’ agents confirmed it. Time was treated as running from the earlier notice rather than only from the commencement of operations. The case shows the importance of how charterers, agents, terminals, and receivers respond to NOR. Silence, acceptance, or confirmation can have serious consequences.

Expiry of the Notice or Preparation Period

The fourth requirement is the expiry of any contractual notice period. Many charter parties provide that laytime begins a fixed period after NOR is received or accepted. In tanker forms, six hours after receipt of NOR is common. In dry cargo forms, GENCON-style rules often set commencement by reference to the time of day when NOR is tendered.

This notice period gives the charterer a practical interval to prepare for cargo operations. It may allow time to arrange labour, documents, trucks, barges, shore equipment, cargo delivery, sampling, inspections, hoses, loading arms, or receivers. Unless the charter party states otherwise, time before the end of the notice period is not laytime, although some clauses provide that time used before the formal start of laytime will count.

If cargo operations begin before the notice period expires, the charter party may provide that laytime starts when work starts, or that time actually used counts. The exact wording is essential. Common wording includes “NOR plus six hours or commencement of loading/discharging, whichever first occurs” or “time used before commencement of laytime shall count.” Such wording can reduce disputes and prevent a charterer from receiving free operational time.

Laycan and the Start of Laytime

Laycan is the laydays/cancelling period. The first date is usually the earliest date on which the charterer is obliged to accept the ship for loading, and the second date is the cancelling date. If the ship is ready after the cancelling date, the charterer may have the option to cancel, depending on the cancelling clause.

A common misunderstanding is that NOR can never be tendered before the first layday. Unless the charter party expressly prohibits early NOR, a ship may be able to tender a valid NOR before the laydays begin if she has arrived and is ready. However, laytime will not usually commence before the first layday unless the charterer agrees or the charter party expressly provides otherwise. Many tanker forms state that laytime shall not commence before the stipulated date without charterer’s sanction.

Express Exceptions to Laytime After Commencement

Once laytime has commenced, it normally runs continuously until loading or discharging is completed. This is the starting rule. If the charterer wants certain periods to be excluded, the charter party must say so clearly. Exceptions to laytime are interpreted carefully and often narrowly because they reduce the time for which the shipowner has already been compensated through freight.

Sundays, Holidays, and Unless Used

Laytime clauses frequently exclude Sundays and holidays. The effect depends on the wording. SHEX means Sundays and holidays excluded. SHEX UU means Sundays and holidays excluded unless used. SHEX EIU means Sundays and holidays excluded even if used. SHINC means Sundays and holidays included.

Whether a day is a holiday is a factual question determined by local law, port practice, and custom. A holiday does not always mean only a national public holiday. In some regions, Friday or Saturday may be treated as the weekly rest day instead of Sunday. Saturdays are not automatically holidays unless the charter party or local practice makes them so. The fact that overtime is payable does not necessarily convert a working day into a holiday for laytime purposes.

Weather Permitting and Weather Working Days

Weather clauses are crucial in dry bulk shipping. Rain may stop grain loading but have no effect on the discharge of some other cargoes. Strong wind may stop crane operations. Swell may prevent safe loading by grabs or barges. The effect of weather depends on the cargo, the operation, the port, and the words used in the laytime clause.

Where laytime is expressed as weather working days or weather permitting, time may not count when weather prevents the relevant cargo operation. In some cases, weather periods can be excluded even while the ship is waiting for a berth if the same weather would have prevented cargo work had the ship been berthed. The Statement of Facts, port log, weather station records, terminal reports, and agents’ remarks are all important evidence.

Other Specific Exceptions

Charter parties may exclude time lost because of strikes, lockouts, mechanical breakdowns, shore equipment failure, ice, government interference, night restrictions, shifting, deballasting, slops handling, fumigation, inspections, or other agreed events. The party relying on the exception must show that the event falls within the clause and, where required, caused the relevant delay.

Clauses must be read carefully. A “mechanical breakdown” is not necessarily the same as destruction by fire. A strike clause may or may not cover congestion caused by the after-effects of a strike. A general force majeure clause may not affect laytime unless it expressly applies to laytime or demurrage.

General Exceptions and Demurrage

The familiar rule “once on demurrage, always on demurrage” means that once laytime has expired and the ship is on demurrage, ordinary laytime exceptions usually no longer protect the charterer unless the charter party expressly says that they also apply to demurrage. Demurrage is liquidated damages for detention beyond the agreed laytime. After that point, the charterer normally bears the risk of further delay.

Parties can contract out of this rule. Some tanker forms contain clauses under which certain events reduce demurrage by half or exclude demurrage entirely for defined periods. If that is intended, the clause should expressly refer to demurrage and not merely to laytime.

General exceptions clauses in charter parties usually do not suspend laytime or demurrage unless they clearly say so. Specific laytime and demurrage provisions are treated as the parties’ agreed code for time counting. A broad exceptions clause dealing with liability in general will not normally override those specific clauses.

Shipowner’s Fault and Use of the Ship for Shipowner’s Purposes

Separate from express exceptions, laytime and demurrage may be suspended where delay is caused by the shipowner’s fault. If the shipowner or those for whom the shipowner is responsible prevent cargo operations, the charterer should not be charged for time lost because the ship was not available as promised.

Examples may include unclean holds, defective gear, failure to provide required documents, unnecessary ballasting or deballasting for the shipowner’s convenience, crew negligence causing delay, or the shipowner voluntarily withdrawing the ship from the charter service for unrelated purposes. The key question is whether the shipowner’s fault was the effective cause of the lost time.

Laytime and demurrage may also stop where the shipowner uses the ship for a purpose unrelated to the charter party after laytime has started. The charterer has paid freight for the use of the ship during laytime. If the ship is removed from the charterer’s service for the shipowner’s own purposes, time should not run during that period.

Practical Checklist for Masters, Operators, and Chartering Teams

Because laytime commencement disputes are often evidence-driven, practical discipline is essential. A master, operator, port agent, or post-fixture desk should check the charter party before arrival and identify the exact requirements for NOR and laytime commencement.

• Confirm whether the charter is a port charter, berth charter, dock charter, or a special form with WIPON, WIBON, WIFPON, WICCON, reachable-on-arrival, or waiting-for-berth wording.
• Check the laycan, cancelling date, NOR tendering hours, required recipients, method of service, and whether NOR may be tendered before the first layday.
• Verify whether the ship is physically ready, including holds, tanks, hatches, cranes, pumps, cargo systems, ballast arrangements, and any cargo-specific requirements.
• Verify legal readiness, including free pratique, customs, immigration, ISPS, port clearance, cargo documents, certificates, and terminal permissions.
• Tender NOR strictly in accordance with the charter party and keep proof of receipt by the correct party.
• If there is doubt, tender further Notices of Readiness without prejudice to earlier notices when the ship reaches a new relevant position or obtains a new clearance.
• Ensure the Statement of Facts accurately records arrival, anchoring, NOR tendering and receipt, berth availability, free pratique, customs clearance, inspections, shifting, weather, cargo work, stoppages, and completion.
• Reserve rights promptly if an NOR is disputed, if charterers reject the notice, or if agents insert inaccurate remarks into port documents.

Conclusion

The commencement of laytime depends on a combination of law, contract wording, port practice, and evidence. The ship must reach the agreed destination, be ready in all material respects, tender a valid Notice of Readiness where required, and wait out any contractual notice period before laytime begins. However, each of these requirements can be modified by the charter party.

Port and berth distinctions, WIPON and WIBON clauses, reachable-on-arrival wording, free pratique and customs provisions, hold readiness clauses, GENCON and ASBATANKVOY notice periods, and waiver principles all affect the final laytime calculation. Because the financial consequences can be substantial, the safest approach is careful drafting at fixture stage, strict compliance at operational stage, and accurate documentation at post-fixture stage.

In voyage chartering, laytime is not merely a timekeeping exercise. It is the commercial mechanism that allocates the cost of port delay between shipowner and charterer. Clear clauses, valid NOR, reliable evidence, and disciplined communication remain the best protection against demurrage disputes.