Hours of rest calculator
STCW VIII/1 + MLC A2.3.5 set the minimum rest hours for every seafarer worldwide: at least 10 hours in any 24-hour period + at least 77 hours in any 7-day period. Rest can be split into no more than two periods per 24-hour window, of which one must be at least 6 hours long. Consecutive breaks between rest periods must not exceed 14 hours. This calculator validates a 7-day pattern against these rules + flags every breach. Data stays in your browser only.
Click cells to toggle work (blue) / rest (green). The grid represents 7 days × 24 hours. Compliance recomputes on every change.
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NON-COMPLIANT
- Total rest (7 days)
- 112 hours (min 77h required)
- Violations of 10h/24h rule
- 0
- Violations of 77h/7d rule
- 0
- Partitioning violations
- 7 day(s)
All data stays in your browser. Audit-trail format matches IMO MSC.1/Circ.1493 (Guidance on fatigue management).