The complete seafarer & vessel compliance app — one app instead of a stack of spreadsheets
A seafarer tracking sea time for a tax return has a completely different day-to-day from a Master or Purser trying to walk into a Port State Control inspection clean. SeaLog is built for both, from your own crew card to the vessel's Master Terminal.
Two logins, one boat
The same app, the same synced data — but what you see depends on who you are.
For Seafarers
Your own crew card: SED tax days tracked to HMRC's HS205 method, certificate expiry at a glance, and a live roster status — all in your pocket, no vessel admin required to get started.
For Vessel Admins
The Master Terminal: a rest-hours monitor engineered to MLC 2006, vessel-wide compliance status, a cash ledger and payroll — everything the ship's office needs, synced from every crew device.
Built for the realities of life at sea
Not a port-side SaaS tool adapted for ships — designed offline-first, from a mariner's own logbook.
100% Offline-First
Every log, certificate and record lives on the device first. No signal, no problem — data syncs to the admin once a connection's available.
MLC 2006 / STCW Compliance Engine
The 10-hour daily / 77-hour weekly minimum rest rules run as true rolling windows, not calendar-day guesses — and a breach pushes a notification straight to the admin, not just a red cell in a spreadsheet.
One App Instead of a Spreadsheet Stack
Cash ledger, compliance matrix, roster planning, payroll and expense review — the ship's office runs from one Master Terminal, not five spreadsheets that never agree.
Export-Ready for Paperwork & Audits
Every log is built to leave the app: official IMO/ILO formats, safe reconciliations, compliance status and payroll summaries — export in a tap, ready to sign or file.
Every corner of the paperwork drawer, digitised
What crew and vessel managers actually use, day to day.
Work / Rest Hours
A true 30-minute record — matching the paper/Excel logs vessels already sign — with the compliance maths done for you.
- Long-press to mark Work, Meal or Drill; blank is automatically rest
- True rolling 24-hour and 7-day windows, not calendar-day shortcuts
- Admin-approved emergency override with linked compensatory rest
- Official IMO/ILO Model Format export, ready to sign and file
Compliance Matrix
The vessel manager defines what each department must have on file — SeaLog checks it against synced crew documents automatically.
- Required certificates configured per department (Deck / Engine / Catering…)
- Matched by category and fuzzy name against uploaded documents
- Vessel-wide red / amber / green view for the Master Terminal
| Crew | ENG1 Medical | STCW Basic Safety | CoC |
|---|---|---|---|
| J. Aldridge | On file | On file | Expiring |
| M. Okoye | On file | Missing | On file |
Vessel Safe Ledger
Every note in and out of the safe, logged against a starting float per currency — so reconciling the till stops being guesswork.
- Bonded store sales, cash advances, shore transport, or a custom entry
- Running balance per currency, always matching what's physically in the safe
- Cash advances can optionally flow through to that crew member's payroll
Crew Card & Roster
A crew member's identity travels as a QR code, not a spreadsheet row — scan once to link a device to the vessel.
- Admin-issued QR crew cards for managed vessels
- Solo self-created card for crew not tied to a managed vessel
- Live onboard/off status and days-until-next-change, always visible
Expenses & Payroll
Crew submit an expense with a photo of the receipt; the Master Terminal reviews, adjusts and approves — with a running payroll summary underneath.
- Submit-and-track expense workflow with pending/approved/rejected status
- Admin can adjust amount, currency or category before approving
- Payroll expense summaries per crew member, per month
SED Tax Tracker
Built around HMRC Helpsheet HS205 — the day-counting rules that decide whether you qualify for the Seafarers' Earnings Deduction, kept as a running record instead of a January scramble.
- 365-day qualifying period, 183-day single-visit limit and the departure/return midnight rule, applied automatically
- "Import from rotation" turns your onboard schedule into reviewable trips in one tap
- Exports as a supporting record for your Self Assessment — not a submission, not a substitute for your accountant
User guides
Short, practical guides covering every corner of SeaLog.
Getting Started
Install SeaLog, create your crew card, and find your way around the app.
Read guide →Setting Up a Vessel (Admin)
Unlock the Master Terminal, issue crew QR cards, and configure the compliance matrix.
Read guide →Logging Work / Rest Hours
Mark a day, apply a saved pattern, and understand what the compliance colours mean.
Read guide →Submitting an Expense
Attach a receipt, track its status, and see it reflected in your payroll summary.
Read guide →Running the Compliance Matrix
Define required certificates per department and read the vessel-wide status view.
Read guide →Exam Tracker & Syllabus Index
Track an MCA exam date and find the right official syllabus and dates.
Read guide →Tracking Sea Time for Tax (SED)
Log trips, understand the HS205 day-count rules, and export a supporting record for Self Assessment.
Read guide →Crew Card & Roster
Set up your card, personalise it, and understand how live rotation status and back-to-back pairing work.
Read guide →Payroll & Wage Runs (Admin)
Set a salary, review the month, and approve, export and send wage accounts to crew.
Read guide →Ready to ditch the spreadsheets?
SeaLog is currently in closed testing with real crews. Get in touch to be part of the early access group and bring your rest hours, compliance, ledger and payroll into one app.