NMEA Mapper 3D

NMEA Mapper 3D

Fishfinder · 3D depth maps

Map the seabed in 3D
from your own fishfinder

NMEA Mapper 3D reads depth and GPS from your boat over Wi-Fi and builds a private 3D map of the bottom as you drive. No extra sonar to buy, no subscription.

Download on theApp Store Get it onGoogle Play

iPhone · iPad · Android

NMEA Mapper 3D: a recorded reef in 3D with contour lines and marks, next to an iPhone showing the app
Your fishfinderAny NMEA 0183 source over Wi-Fi
3D seabedBuilt live from your own soundings
No subscriptionFree to use, one purchase removes ads
No accountYour maps and spots stay on your device

Everything you need on the water

From the first sounding to the spot you come back to next season.

Your own 3D depth maps

Press Record and watch the bottom take shape behind your boat. Tilt, turn and zoom over every ledge, drop-off, reef and wreck you pass.

Live depth sonar

A fishfinder-style depth history over 1, 2 or 10 minutes. Scroll back, tap any moment to see where it was, and mark that spot.

Charts and seamarks

Street chart or satellite map with buoys, lights and harbour marks from OpenSeaMap. Areas you have viewed stay on your phone for use offline.

Mark your spots

Fish, schools, hotspots, wrecks, reefs, anchorages and hazards, with species, colour, notes and the depth. Import and export them as GPX.

Every trip saved

Each recording becomes a track with its depths, distance and time. Dive into the 3D seabed from any point of it, or share it as GPX.

Catch log

Species, length, weight, bait and a photo in seconds. Depth, water temperature, moon and bite period are filled in, and Insights show what your best days share.

Bite times

A solunar calendar with major and minor bite periods for your spot, sun and moon times, and a reminder before the next bite.

Depths you can trust

Transducer depth and keel offset, depth from the surface, transducer or keel, and tide correction from nearby tide stations or set by hand.

Works with your boat

Connects to a Wi-Fi gateway, multiplexer, chartplotter or fishfinder with NMEA 0183 over TCP or UDP, and finds it automatically.

See it in action

On iPhone and iPad. Swipe to see more.

Map the seabed in 3D Record as you drive Satellite chart with seamarks Live depth sonar Mark fish, wrecks, reefs and hazards Log every catch Know the best bite times Depths you can trust All your marks in one place Keep every trip

Learn it in minutes

The User Guide takes you from connecting your boat and recording your first depths to the sonar, marks, catch log and bite times.

  • Quick start in five steps
  • Connecting to your boat’s NMEA over Wi-Fi
  • Tips and answers to common questions
Read the User Guide

Your data stays yours

NMEA Mapper 3D needs no account. Your depth maps, marks, tracks and catches are stored on your device, never on our servers.

  • No sign-up and no data selling
  • Your depth maps never leave your phone
  • Usage statistics only if you allow them
Read the Privacy Policy
NMEA Mapper 3D app icon

Get NMEA Mapper 3D

For iPhone, iPad and Android. Free to use.

Download on theApp Store Get it onGoogle Play
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