10 hours rest in 24 hours explained
The 10-hour daily rest limit is one of the rules a digital rest-hour logbook has to check. It is not the product category. The parent topic is passenger vessel rest-hour compliance.
Quick Answer
Under the applicable rest rule, a seafarer must have at least 10 hours of rest in any 24-hour period. That is not a midnight-to-midnight box. Any applicable 24-hour window must contain those 10 hours. Fourteen hours of work in 24 hours is the other side of the same limit.
Official Sources
- Sjøfartsdirektoratet: Arbeids- og hviletid for sjøfolk — Norwegian Maritime Authority guidance on work and rest hours for seafarers.
- STCW Code Section A-VIII/1: Fitness for duty — Official Norwegian publication of the STCW fitness-for-duty rest requirements.
- Ship Safety and Security Act (LOV-2007-02-16-9) — Section 24 sets the Norwegian minimum rest hours of 10h/24h and 77h/168h.
- ILO Maritime Labour Convention, 2006 (MLC) — Standard A2.3 covers maximum work hours and minimum rest hours.
Why it matters onboard
On a ferry or tour boat the timetable can look fine while a crew member’s rolling 24 hours does not. An early first departure and a late last arrival, or a cover watch after sickness, push work across what used to be a clean day. Captains who only glance at “today’s roster” miss the window that started yesterday afternoon.
How it is documented
STCW A-VIII/1 and the Ship Safety and Security Act section 24 require at least 10 hours of rest in any 24-hour period, recorded as daily rest hours and endorsed. The record must show actual work and rest, not a reconstructed sheet that only matches the timetable.
If rest is split, the documentation still has to show the two periods and the interval between them — that is the 6h/14h split-rest structure, not a third daily limit.
What operators need to consider
Check the applicable 24-hour periods from actual clock times. Include work on other vessels within the same organization. Do not treat a published timetable as proof of rest. The 77 hours in 168 hours requirement is a separate check; a green 24-hour indicator does not report weekly status.
How MarRest handles it
MarRest evaluates 24-hour rest at hourly checkpoints ending at HH:59:59. Its green / amber / red status is this 24-hour indicator only: red below 10 hours, amber from 10 to under 11 hours, and green from 11 hours. At clock-in, a non-blocking warning uses the planned end or may assume a 12-hour duration when no end exists to show that the watch could create a deficit. Monthly reports use the same recorded work/rest data.