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The Intricacies of Laytime Calculation: A Simplified Guide

Table of Contents
Written by

Capt Kunal Narayan Uniyal

CO-Founder of Integrated Maritime Exchange and IMBA, Kunal is a first-class postgrad from the Cardiff Uni with 19 years of both onshore and offshore experince.

In the world of shipping and logistics, laytime calculation is a crucial process that can significantly impact the profitability of both the shipowners and charterers. While it may sound like a straightforward calculation at first glance, it involves many intricate details and legal clauses. Mistakes in laytime calculations can lead to disputes, financial losses, or even strained relationships between parties. In this blog, we will break down the complexities of laytime calculation in simple terms and explain why it’s so important in the shipping industry.

What is Laytime Calculation?

Laytime refers to the amount of time allowed for loading and unloading cargo on a ship. It is agreed upon in a contract between the shipowner and the charterer (the person or company who hires the ship). Laytime calculation is the process of determining whether the cargo loading or unloading was completed within the agreed laytime or if there was a delay. If the laytime is exceeded, the charterer may need to pay demurrage(a penalty for extra time). If the laytime is shorter than agreed, the shipowner may have to pay dispatch money(a reward for saving time). For example, if a charter party (shipping contract) allows for 5 days of laytime to load a cargo and it takes 6 days, the charterer may have to pay demurrage for the extra day. However, if the loading takes only 4 days, the shipowner may owe dispatch money for saving time.

Who Does Laytime Calculation?

Laytime calculations are typically done by professionals in the shipping industry who are well-versed in the legal and practical aspects of shipping. The main people responsible for doing these calculations are: Shipowners: They own the vessel and want to ensure that they are compensated if the charterer exceeds the agreed laytime. Charterers: They hire the vessel and want to make sure they don’t pay demurrage unnecessarily or that they get dispatch money if the laytime is shorter. Shipbrokers: Sometimes, shipbrokers (who act as middlemen between shipowners and charterers) may help with the calculation of laytime to make sure both parties are on the same page. Shipping agents: They assist in handling the vessel at ports and may also be involved in tracking laytime at the loading and unloading terminals. These people often work together, using documentation and precise timing records to calculate the exact amount of time used for loading and unloading.

How is Laytime Calculation Done Manually?

Laytime calculations can be complex, especially when done manually, because they involve tracking time very carefully. Here’s a basic step-by-step process for how it’s done: Start Time: The laytime clock starts when the vessel arrives at the agreed place and is ready for loading or unloading. This moment is called the “Notice of Readiness” (NOR). Track Time: Every hour and minute counts once the laytime clock starts. Time must be tracked carefully, including when the loading or unloading begins and ends. Stopping the Clock: Certain events, such as bad weather or holidays, may stop the laytime clock. This is called “laytime interruptions.” These stoppages must be recorded carefully. Final Calculation: Once the cargo has been fully loaded or discharged, the total laytime is calculated by adding up the time used, minus any time that was interrupted or stopped. Compare with Agreed Laytime: The final laytime is compared to the agreed time in the charter party. If the agreed time is exceeded, demurrage is calculated; if it’s shorter, dispatch money is calculated. Manual laytime calculation is time-consuming and prone to errors due to the number of variables involved. Every minute must be tracked, and each interruption (such as weather or port delays) needs to be accounted for, which adds to the complexity.

Which Documents Are Required for Laytime Calculation?

Laytime calculation requires careful documentation. The following documents are typically used: Charter Party Agreement: This is the main contract between the shipowner and the charterer. It specifies the agreed laytime, rates for demurrage and dispatch, and any exceptions or special clauses. Notice of Readiness (NOR): This document states that the vessel is ready to load or unload. The time the NOR is issued is crucial for starting the laytime clock. Statement of Facts (SOF): This document records the important events during the ship’s stay at the port, such as when loading or unloading began, when it was completed, and any interruptions like weather or port closures. Timesheets: These are detailed logs of the exact time spent on each part of the loading or unloading process, including any stoppages. Bill of Lading: This is a document issued by the ship’s master or agent detailing the cargo on board. It can provide additional evidence for cargo loading or unloading times. Weather Reports: If bad weather interrupts loading or unloading, these reports can be used to justify the stoppage of the laytime clock. Each of these documents must be accurate and timely, as even a small mistake can lead to disputes over laytime calculations.

Why is Laytime Calculation Complicated with Respect to Charter Party Clauses?

The complexity of laytime calculation comes from the different clauses and terms in the charter party agreement. These clauses are often written in legal language, and they can vary significantly between contracts. Some of the complications include: Laytime Exceptions: Certain events like bad weather, strikes, or port congestion may stop the laytime clock. Different charter party agreements have different rules on what counts as an exception. Different Time Zones: Vessels often operate across multiple time zones, and differences in time records can cause confusion. Customs of the Port: Every port operates differently, and the local customs may affect how laytime is calculated. For example, some ports may not count weekends or holidays, while others do. Split Laytime: Sometimes, the laytime is split between different cargo operations or between loading and unloading at different ports, making the calculation more complicated. Once On Demurrage, Always On Demurrage: This common clause means that once laytime has been exceeded and demurrage has started, it will continue uninterrupted until the loading or unloading is completed, even if there are valid stoppages. These various clauses make it difficult for someone unfamiliar with shipping law to calculate laytime correctly. Misinterpretations of the clauses can lead to disputes between the shipowner and charterer.

What Problems Do Companies Face for Demurrage and Dispatch Claims?

Demurrage and dispatch claims can be a major source of tension between shipowners and charterers. Some of the common problems include: Disputes Over Laytime Interruptions: One party may claim that bad weather or a strike should stop the laytime clock, while the other party disagrees. These disputes often lead to delays in settling demurrage or dispatch claims. Lack of Clear Documentation: If the NOR, SOF, or other documents are missing or inaccurate, it can be hard to prove exactly when laytime started and ended. Misinterpretation of Charter Party Clauses: Since every charter party is different, misunderstandings about the clauses governing laytime, demurrage, and dispatch are common. For example, one party may believe that weekends shouldn’t count toward laytime, while the other believes they should. Delays in Settling Claims: Calculating demurrage or dispatch manually and dealing with disputes can take weeks or even months, which can cause financial strain, especially for smaller shipping companies. Over- or Under-Payment: If the laytime calculation is incorrect, the charterer may end up overpaying demurrage or the shipowner may underpay dispatch, leading to further disputes and claims. Because of these challenges, many companies now use digital tools and AI-based platforms to automate and simplify laytime calculations.

Conclusion

Laytime calculation is a critical yet complicated process in the shipping industry. While the concept is simple — calculating the time used for loading or unloading cargo — many factors make it difficult in practice. The interpretation of charter party clauses, the careful tracking of time, and the need for precise documentation all contribute to its complexity. Furthermore, disputes over demurrage and dispatch claims can arise from misunderstandings or errors in laytime calculation, leading to delays and financial losses. Fortunately, new technologies like AI and automated platforms are helping to make laytime calculations faster, more accurate, and less prone to disputes. By simplifying this process, companies can avoid costly mistakes and focus on more important aspects of their business, such as improving operational efficiency and customer satisfaction. In conclusion, while laytime calculation may seem like just another routine task in the shipping world, its intricacies can have a major impact on the outcome of shipping contracts. Understanding these details and using the right tools to manage them is essential for anyone involved in the maritime industry.