Calculate true wind direction and speed for sailing. Input vessel speed, apparent wind, and angle to determine accurate wind data.
CHIEFMATE: Marine Navigation by STEM Maritime Systems LLC
Offline celestial navigation





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Calculate true wind direction and speed for sailing. Input vessel speed, apparent wind, and angle to determine accurate wind data.






This app provides professional marine navigation with official ENC charts and real-time weather data. It offers advanced instrument displays, alerts for restricted areas and fishing closures, and route planning capabilities for safe and informed voyages.