HMB Sailing LogBook

LacoSte

About this app

LOGBOOK
• Voyages with full vessel and crew details
• Entries written automatically from GPS, or by hand
• Weather, sea state, ports, distances and skipper's notes
• Your track on the chart, offline too

GPS TRACKING
• Position tracking under way
• Automatic entries at the interval you choose
• Export the track as GPX, import tracks from elsewhere
• Raymarine Wi-Fi gateway (NMEA 0183) — with boat instruments connected the phone's GPS shuts down and the readings come from them

SAFETY
• MOB (man overboard) — records the position, counts the time and the distance back
• Anchor alarm — warns when the boat leaves the circle you set
• Safety briefing signed by the crew on screen
• MAYDAY procedure, COLREG rules, flag signals, day shapes, Morse converter

BEARING COMPASS
• Take bearings through the camera — point the phone at a landmark or a vessel
• Tilt-compensated magnetic heading
• Fix your position by crossing several bearings

WATCHES AND MILES
• Crew watch roster with hours served
• Mile book — miles sailed, night passages, crew certificates
• Add older voyages retrospectively

WEATHER AND SEA
• Forecast for where you are: wind, waves, temperature, precipitation
• Tides and ocean currents

PDF EXPORT
• The log with track, entries, photos and charts
• Safety briefing page signed by the whole crew
• Unique document ID (e.g. HMBSL-5-2026) and revision number
• QR code carrying a cryptographic fingerprint, so the document can be checked for tampering

BACKUP AND CLOUD
• Back up the whole logbook to a file
• Optional automatic upload to your own Google Drive

DISPLAY
• Night mode — a red filter that keeps your night vision on watch
• Date format, units and how GPS coordinates are written are yours to set, and apply everywhere, PDF exports included

LANGUAGES
English, German, Italian, Spanish, Croatian, Czech, Slovak, Polish, Slovenian, Greek and Ukrainian.

The app runs fully offline. Syncing the logbook between devices is in preparation.

What’s new

New: transcribe a voyage from a paper logbook (Mile Book → +): add days, type the time and position of each entry, enter the day's miles and night hours, attach a GPX.
• New: export a whole voyage as one CSV file (Exports) and import it back (icon at the top of the Logbook).
• New: the captain's highest qualification shows in the voyage and in the PDF.
• New: delete a voyage from the Mile Book.
• The map centres on a previewed voyage.