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Required speed for an ETA
The speed you need to make to arrive at the pilot station, anchorage or berth at a set time, even when it is in another time zone.
Positive with you, negative against
Fill in the fields to see the result.
How it works
Required speed = distance to go / time to go. Both times are turned into UTC first (local − zone), so a pilot booked for 06:00 local in another zone is handled correctly. That is the speed over the ground; with a known current along the track, the log speed is that minus the current.
Keep a margin for traffic, weather and reduced speed in pilotage waters; check the result again as you go.
For training and cross-checking. Not a substitute for approved navigation equipment, nautical publications and the ship’s own procedures. Calculations run in your browser and nothing you type is stored; a PDF you download is made on our server and not kept.
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