Open Source Marine Software and Data

Understand and navigate the sea with tools built through open source collaboration.

A nautical-themed map with depths, seamarks, and hazards.

A map of the seafloor with contours, depth shading, and soundings.

Tide predictions powered by the Neaps engine, with data from thousands of stations worldwide.

Live vessel traffic from open government feeds and volunteer receivers, streamed by bounding box.

Collect and share depth data from your vessel to contribute to crowd-sourced bathymetry programs.

Join our community of mariners, developers, and ocean enthusiasts building better tools for the sea.