Logbook: offline
Most of your sea time happens where there is no signal, or only expensive signal. Bridgedeck Logbook is built for that: everything you log is saved on your phone first, and the backup catches up when you're back in range. Here is what works offline, what doesn't, and where your data goes.
Yes. In the store listing's words, it “works completely offline, so you can log a watch mid-ocean with no signal”. Signing on, starting and ending a voyage, logging a watch, adding past service and editing voyages all save straight to your phone without waiting for a network.
Your totals and Career screen, which are worked out from what's on the phone; your certificates and their phone reminders, which are scheduled on the device; and switching the app's language, which happens instantly with no download.
In practice: signing in, the backup itself, sharing a PDF or link by email or message, the expiry email that backs up the phone reminders, and buying Bridgedeck Pro. Your public sea-service profile, if you turn it on, shows your backed-up figures, so it updates after your logbook syncs.
Yes. The store listing says your logbook “backs up privately to the cloud”, and it “syncs securely when you're back online”. The backup is automatic — there is no switch to turn it off — and the app shows when it last synced, with a tap to back up now.
The copy on your phone is the one you work with. The backup catches up with it whenever there is a connection, so entries you saved while offline are backed up the next time you have signal.
Photos in the certificate vault (a Pro feature). The store listing says they are “stored on your device only, never uploaded”. Your language choice also stays on the phone.
Yes. You sign in when you first open the app, and that account is what your backup belongs to.
Sign in on the new phone and your logbook comes back from the backup. The app waits for that first download before it decides whether you're new, so you won't be asked to set everything up again over your records.
In practice, do that first sign-in while you still have a connection — before you join, not after you sail.
iPhone and iPad (iOS 15 or later) from the App Store, and Android from Google Play, with an Apple Watch app (watchOS 10 or later) for logging watches from the wrist, and a Mac version (macOS 10.15 or later).
Free up to 100 sea days; Bridgedeck Pro, an optional paid subscription, unlocks unlimited logging after that. Offline logging and backup are part of the free app, and your existing records are always free to view and export.
The notices change. Always check the current version on GOV.UK before you apply or book.
Study and Logbook are both live on the App Store. Open either to get started.
