Here’s another example of laytime calculation in a voyage charterparty agreement:
Charterparty Terms:
- Allowed laytime for loading: 36 hours
- Allowed laytime for discharging: 60 hours
- Demurrage rate: $12,000 per day or pro-rata
- Despatch rate: 50% of demurrage rate
Timeline:
- Ship arrives and gives Notice of Readiness (NOR) at the loading port on May 5 at 14:00.
- Laytime starts counting after 4 hours of waiting time on May 5 at 18:00.
- Loading completed on May 7 at 20:00.
- Ship arrives and gives NOR at the discharging port on May 14 at 09:00.
- Laytime starts counting immediately.
- Discharging completed on May 16 at 15:00.
Laytime Calculation:
Loading:
- Calculate the actual laytime used for loading: From May 5, 18:00, to May 7, 20:00, which is 2 days and 2 hours, or 50 hours.
- Compare actual laytime used (50 hours) with allowed laytime (36 hours): The actual laytime exceeds the allowed laytime by 14 hours.
- Calculate demurrage for loading: 14 hours of excess laytime, which is 7/12 of a day. Demurrage is $12,000 per day, so the demurrage for loading is (7/12 * $12,000) = $7,000.
Discharging:
- Calculate the actual laytime used for discharging: From May 14, 09:00, to May 16, 15:00, which is 2 days and 6 hours, or 54 hours.
- Compare actual laytime used (54 hours) with allowed laytime (60 hours): The actual laytime is less than the allowed laytime by 6 hours.
- Calculate despatch for discharging: 6 hours of unused laytime, which is 1/4 of a day. The despatch rate is 50% of the demurrage rate, so the despatch for discharging is (1/4 * 0.5 * $12,000) = $1,500.
Final Settlement:
- Calculate the difference between demurrage and despatch: $7,000 (demurrage) – $1,500 (despatch) = $5,500.
- Since the difference is positive, the charterer owes the shipowner $5,500 as demurrage payment.
In this example, the charterer is liable to pay demurrage to the shipowner, as the actual laytime used exceeded the allowed laytime for loading, while the actual laytime used for discharging was less than the allowed laytime.
