Bridge Calc · True Wind & ETA

Observed on board

Relative wind speed

0 kn100 kn

Relative wind direction

° rel

000°359°

0–359° clockwise from the bow: 000 ahead, 090 starboard beam, 180 astern, 270 port beam.

Own speed

0 kn30 kn

Own heading

°T

000°359°

True wind speed

–

True wind direction

–

Compass point

–

Beaufort

–

Description / true wind relative to the bow

–

Beaufort scale (true wind)

Wind picture

True wind Relative wind Ship's heading

Arrows point the way the wind blows, from where it comes. Drag the relative wind label to change its direction, or the black marker on the rim to change heading.

Voyage

ETD (departure local time)

Departure zone

Destination zone

Distance to go

0 nm12000 nm

Required speed

Required ETA (destination local time)

Required speed

–

Hours to go

–

–days

–hours

–minutes

ETA by speed

Speed	Steaming time	ETA

ETA = ETD + distance ÷ speed, corrected for the difference between departure and destination zones.