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SeaLagom is a maritime navigation warning and information service that brings NAVAREA, coastal and NAVTEX warnings from authoritative sources together on a live interactive map. Mariners can search messages, review regional alerts, track warning status and trends, and read daily briefings that analyse recent changes. The service also provides information on reported problems with lights and buoys, with warnings available for awareness and cross-checking against official maritime safety channels.

SeaLagom offers tools for voyage and fleet reporting. Users can upload vessel files, voyage logs, ship particulars, routes or Excel noon reports to calculate and check operational figures such as speed, distance to go, ETA, fuel on board and slip. Reports can be created in existing Excel layouts or standard formats including AMVER, SISTRAM and UKMTO.

Warnings can be exported in formats for GIS, planning tools and bridge ECDIS, including products compatible with Furuno, TRANSAS and JRC systems. Available formats include TXT, PDF, KML, GeoJSON, CSV, Shapefile and others; API access provides structured data.