# BathyMaps Companion > Offline bathymetry for fishing — 3D terrain, satellite imagery, marks & tracks. Canonical page: [https://chrome-stats.com/d/com.bathymapsorg.bathymapsoffline](https://chrome-stats.com/d/com.bathymapsorg.bathymapsoffline) ## Overview - **ID:** `com.bathymapsorg.bathymapsoffline` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** BathyMaps - **Category:** MAPS\_AND\_NAVIGATION - **Downloads:** 1,472 - **Last updated:** 2026-09-03 - **First published:** 2026-07-01 - **Publisher country:** AU - **Data as of:** 2026-09-17 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.bathymapsorg.bathymapsoffline) - **Website:** [https://bathymaps.com.au/](https://bathymaps.com.au/) - **Privacy policy:** [https://bathymaps.com.au/about/terms#privacy-policy](https://bathymaps.com.au/about/terms#privacy-policy) ## Description Take your maps far beyond signal.

The BathyMaps Companion app puts detailed bathymetry on your phone — contours, depth shading and the full colour palette, with your position, speed and heading live on the chart. Download the regions you fish and the whole map works completely offline: every contour, every colour, full detail, 40 km from the nearest bar of signal.

OFFLINE, PROPERLY
• Pick a region on the map, see its exact size before you commit, and watch it land in seconds — the new download engine pulls whole regions at over 100 MB a minute.
• Add high-resolution satellite imagery for your spots: position a box over the water you fish and save reef edges, sand patches and channels for offline.
• Prove it before you leave the ramp — the offline simulation button makes the app behave exactly as it will with no signal, so you can check your coverage in ten seconds.
• Saved access keeps working for weeks between connections, and the app shows you exactly how many days remain.

TILT INTO 3D
Tap 3D and the seabed rises into living terrain — contour lines and depth labels draped over every ledge, gutter and pinnacle. Pan, pinch and twist to come at a feature from any angle, and wind the exaggeration up to make subtle structure jump out.

YOUR MARKS AND TRACKS
• Every waypoint from your BathyMaps account, sorted by distance and bearing from where you are right now.
• Drop a mark on the crosshair with one tap; file it into groups with notes, bait, tide — whatever matters.
• Made marks out wide with no signal? They queue quietly and sync next time you're connected.
• Record your tracks with a running timer and distance, pause and resume mid-drift, and keep a logbook of every session — recording contributes depth data, so today's drift becomes tomorrow's contour.

STRAIGHT TO THE SPOT
Got numbers from a mate, a magazine or your old sounder? Spin the coordinate wheels — degrees, minutes, seconds, no fiddly typing — and the map flies straight there. Save it as a waypoint or just have a look.

BATHYMART, SYNCED
Ultra-high-resolution surveys purchased on your BathyMaps account appear on the chart automatically, razor-sharp over the surrounding bathymetry — and they come along inside your offline regions too.

MADE FOR THE WATER
• Depth palettes: PaleoMaps, Deep, Original and Satellite.
• Dynamic palette rescaling, contour intervals from 0.5 m, adjustable terrain lighting.
• Coordinates in DD, DDM or DMS; speed in knots or km/h.
• One login for web and app — your BathyMaps plan covers both.

A BathyMaps subscription is required to sign in. Coverage focused on Australian waters. ## Rankings - #1,043,005 — Overall ## Similar extensions and apps - [BathyMaps](https://chrome-stats.com/d/com.bathymaps.test.app) — 3,629 users - [Fish Reveal: Saltwater Fishing](https://chrome-stats.com/d/com.fishreveal.FishReveal) — 1,402 users - [SatFish Offshore Fishing App](https://chrome-stats.com/d/com.satfish.android) — 6,722 users, 4.15 / 5 - [Black Sea Offline GPS Charts](https://chrome-stats.com/d/com.mapitech.blacksea) — 12 users - [Red Sea Offline GPS Nautical C](https://chrome-stats.com/d/com.mapitech.redsea) — 12 users - [FishPin - Marine Navigation](https://chrome-stats.com/d/com.fishpin.app) — 16 users - [Sebago Lake Offline GPS Charts](https://chrome-stats.com/d/com.mapitech.sebago) — 15 users - [Ammer lake Offline GPS Charts](https://chrome-stats.com/d/com.mapitech.lakeammersee) — 34 users - [Flathead Lake Offline Charts](https://chrome-stats.com/d/com.mapitech.flathead) — 17 users - [Bermuda Offline Nautical Chart](https://chrome-stats.com/d/com.mapitech.bermuda) — 19 users - [B&G: Companion App for Sailors](https://chrome-stats.com/d/com.bandg.Bandg) — 56,068 users, 2.95 / 5 - [Chautauqua Lake Offline Charts](https://chrome-stats.com/d/com.mapitech.chautauqua) — 12 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.bathymapsorg.bathymapsoffline)