Backfill
Your whole career, caught up.
Just started logging? Don't retype years of contracts. Add a past vessel or voyage, tell it the dates, and Logbook estimates the sea days for you — then save-and-add-another straight into the next one.
Live on iOS & Android18 languages · Offline-firstNever lose a day of
Never lose a day of
sea time.
Log today's watch in two taps — or backfill years of past vessels and voyages in one sitting, with the sea days counted for you. Offline-first, with a private cloud backup. Free to download.
Backfill past vessels & voyagesFree up to 100 sea days18 languages for the world's crew
New in this release
Log forward — and backward.
The logbook now catches up on the years you already sailed, counts your career two ways, and lets you show the milestones. All free, all offline.
Career
Two numbers, counted apart.
Sea days for the ticket, days aboard for the contract — tracked separately, the way the MCA and your captain actually count them. Milestones tick over at 25, 50, 75, 100%, with an on-pace projection for your next ticket.
Share
Milestones worth showing.
Hit a number you're proud of? Tap share and Logbook builds a clean card — your sea days, your nautical miles — straight to your phone's share sheet. Send it to the crew group, mark the moment. Your data, your call.
What it does
Three jobs, done properly.
Logbook stays out of the way on watch and earns its keep at appraisal time. No habit-loop, no streaks, no nagging.
Watches
Stand it, log it.
A watch is two taps: the hours you stood and a note if you want one, logged inside your voyage on the day.
Voyages
Port to port.
Vessel, GT/kW, dates, distance. Filter the way an officer actually remembers a career: by ship, by season, by rotation.
Certificates
Tickets that ping you first.
Every ticket in one place with expiry reminders that fire well before the deadline catches you. Scans go in a Pro photo vault that never leaves your device.
Your language
Reads in your language, counts in the MCA's.
The sea is crewed by the world, and around 44% of seafarers don't work in their first language. So Logbook now speaks 18 languages — switched instantly, offline, no signal needed — so the crew who don't log in English don't have to. The maritime terms, the PDF and your emails stay in English, because that's what a flag state reads.
English · Français · Español · Italiano · Português · Русский · Українська · Ελληνικά · Hrvatski · Română · Bahasa Indonesia · Türkçe · Polski · Deutsch · Nederlands · 中文 · العربية · Filipino
A look around
Four screens, that's the app.
Logbook is one tab per job. Home, Logbook, Career, Certificates. No menus to dig through, nothing to subscribe to.
Built where it's used
Bridgedeck started because nothing on the App Store understood a watchkeeper's day. Logbooks were forms. Study apps were quiz decks. So we built the tools we wished we'd had on watch — and shipped them.
By a Seafarer. · Independent & self-funded
FAQ
Things people actually ask.
What counts as a sea day?
For a UK yacht deck CoC, the MCA counts a day of seagoing service as one with at least 4 hours of working duty in 24 hours (MSN 1858). Logbook counts sea days from the voyages you log, separately from days aboard — check your totals against your testimonials before you apply.
What happens after 100 days if I don't upgrade?
Everything you've logged stays in the app and stays free to view and export. Bridgedeck Pro unlocks unlimited logging after your first 100 sea days. We don't hold your career hostage.
Where is my data kept?
On your phone first — Logbook works fully offline — and backed up privately to the cloud. Certificate photos in the Pro vault stay on your device and are never uploaded. The full detail is in our privacy policy.
Does the PDF pass a flag-state audit?
It follows the layout of a sea service testimonial for the fields Logbook records, ready to print and have your master sign in ink. Before you submit it, check it against the current form in MSN 1858 Annex A and add anything it doesn't capture.
Can I add sea time from before I installed the app?
Yes — log a past vessel or voyage, give it the dates, and Logbook back-calculates the sea days for you. Save-and-add-another until your whole history's in.
Can I use it in my language?
Eighteen languages, switched instantly and offline — because around 44% of seafarers don't work in their first language. The maritime terms, the PDF and your emails stay in English, because that's what a flag state reads.
More answers: Yacht sea time calculator · Filling in your testimonial · Every question we answer
The bridge between
your sea time and your ticket.
Study and Logbook are both live on the App Store. Open either to get started.