Multipass Voyage Tools

Sea Distance Calculator

Select a departure port and destination to obtain a verified published sea distance. Add speed and departure time when you also need passage time and ETA.

Free voyage tool

Sea Distance Calculator

Search 1,229 verified Pub. 151 port locations. Direct published distances are preferred; longer voyages can be assembled from published NGA junction segments.

Port of departureDestination

NGA Pub. 151 · Eleventh Edition · 2001

Passage time and ETA

Optional. Add an average speed and, if useful, a UTC departure time.

Average speed

Departure UTC

Once the distance is calculated, an option will appear to continue with these results to Passage Planner.

Published sea distances are planning references. They do not replace current nautical charts, Notices to Mariners, routeing requirements, pilotage, weather routing, passage appraisal or the Master’s professional judgement.