Free tool
Enter the totals from your testimonials and see where you stand against the MCA's sea service requirements for OOW (Yachts <3000 GT) and Master (Yachts <500 GT and <3000 GT), under MSN 1858 Amendment 2.
Still building your sea time? Bridgedeck Logbook keeps your sea, stand-by, yard and watchkeeping days as you go, offline, and exports an MCA-style PDF. Free up to 100 sea days.
Checks sea service only, from totals. It can't check per-voyage limits — stand-by counts at most 14 consecutive days at a time — and if you served in a dual deck and engine role, enter that time at half. Courses, exams, your ENG1 and the oral are separate: see OOW Yachts <3000 GT. Nothing you type here leaves your browser. The MCA decides your eligibility, not this page.
36 months' onboard yacht service since age 16. Within it, 365 days' seagoing service on yachts of 15 m or more: at least 250 days actual seagoing, plus 115 days of any mix of seagoing, stand-by and yard service (MSN 1858 §3.3(c)).
Stand-by counts at most 14 consecutive days at a time, never more than the voyage before it, so your total stand-by can never exceed your actual seagoing service. Yard service counts up to 90 days towards OOW (§3.3(c), §5.2).
While holding OOW (Yachts <3000 GT): 12 months' onboard yacht service as a deck officer, including 120 days' watchkeeping, on yachts of 15 m or more (§3.5(b)).
While serving as OOW (Yachts <3000 GT): 24 months' onboard yacht service as a deck officer, including 240 days' watchkeeping, all on yachts of 15 m or more, and including 12 months on yachts of 24 m or more or 6 months on yachts of 500 GT or more (§3.6(a)).
A month is a calendar month, or 30 days where the service is made up of periods shorter than a month; the calculator uses 30. A day of seagoing service needs at least 4 hours of working duty in 24. Service in a dual deck and engine role counts at 50% (§5.1–5.3).
Source: MSN 1858 (M) Amendment 2 — UK requirements for deck officers on large yachts (24m and over).
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