Three calculators that now answer correctly • Fixed: the Dutchman's Log showed twice the speed. You time an object thrown in at the bow until it passes the stern – but the calculation assumed twice the vessel's length. 10 metres in 5 seconds came out as 7.8 knots instead of 3.9. • Fixed: the ETA Calculator accepted a speed of 0. It then returned the departure time as the arrival and a duration of zero hours – "already there" with the vessel stopped. The entry is now rejected with a message. • Fixed: in the Current Triangle a speed of 0 did nothing at all under "Steering Course" and "Determine Current" – no result and no hint as to what was wrong. Under "Course over Ground" the hint did appear, but in German whatever the app language.

NauticCalc is a professional calculator for precise nautical navigation at sea. Designed for sailors, skippers and maritime crews, it helps you plan safe routes, correct courses and understand changing conditions. Use NauticCalc to convert between knots, kilometres per hour, metres per second, miles per hour and feet per second. Switch depth units between metres, fathoms and feet, and handle distance in nautical miles, metres and kilometres with confidence. Plan your voyage with accurate…