Sea Time Ledger
Sea service, day by day

Log your sea time and know which days count

Log each trip in a few taps and see every sea day counted by the published 4 hour rule, with totals by waters against the OUPV and Master numbers.

Log your first tripWhat counts as a sea day

Names stay on your device. Your trips, your vessels, your name and the names of owners who sign for you are stored only in this browser. There is no account, nothing is uploaded, and there is no field for a Social Security number.

An invented week on a 6 GRT skiff

Which days count

  1. Monday3.5 hours on the skiffDoes not count: under 4 hours
  2. Tuesday4 hours on the skiffCounts: exactly 4 hours
  3. Wednesday2 hours in the morning and 2.5 in the evening on the skiffCounts: 4.5 hours on one boat in one day
  4. Thursday12 hours on the skiffCounts as one day, not one and a half
  5. Friday5 hours on the skiff and 7 on a friend's trawlerCounts once, on the trawler (more hours)Two boats, counts once
  6. SaturdayNo tripNo trip logged
  7. SundayNo tripNo trip logged

Change an hours box: under 4 hours on a boat under 100 GRT is not a day. A long day is still one day. Friday is two boats in one day, so it counts once, on the boat with more hours.

  • OUPV (six pack), near coastal

    438 of 360 days. Total met; near coastal and recent days still short.

    Needs 43 more near coastal or ocean days; 12 recency days short.

    Every number, with its section
    • Needs 43 more near coastal or ocean days; 12 recency days short.
    • Published number: 360 days, at least 90 of them near coastal or ocean (46 CFR 11.467(c)).
    • 438 of 360 days counted toward the total (46 CFR 11.467(c)).
    • 47 of at least 90 near coastal or ocean days (46 CFR 11.467(c)). 43 more days needed.
    • 78 of 90 days in the last 7 years (CG-MMC Policy Letter 02-25, the window evaluators apply). 12 days short.
    • 0 of 90 days in the last 3 years (46 CFR 11.201(c)(1)(i), the regulation text). 90 days short.
    • The near coastal OUPV route is limited to 100 miles offshore (46 CFR 10.107, Near-coastal; 11.467(b)).
    • The NMC evaluation checklist (15 September 2025) lists ocean, near coastal or Great Lakes days for the 90 day part; the regulation text names ocean or near coastal, which is what is counted here.
    • 46 CFR 10.232(b)(2) credits inland service toward a near coastal endorsement for at most 50 percent of the required service; 10.232(c) and 11.467(c) are read here as allowing any waters day for day, so inland days are not capped in this total. Ask the evaluators which reading they apply if more than 180 of your days are inland.
    Not yet

An invented log of 438 days. Published number from 46 CFR 11.467(c), rules read 27 September 2026. Sea Time Ledger does not determine eligibility; the credentialing authority decides. The credentialing authority's current rules and its own evaluation govern.

What it is not

  • Sea Time Ledger does not determine eligibility; the credentialing authority decides. The app shows counts against the published numbers, with the section cited.
  • It keeps records and does arithmetic. It gives no navigation or safety advice.
  • Sea Time Ledger is not affiliated with, endorsed by, or connected to the United States Coast Guard, the National Maritime Center or any other government body.