Course to Steer & Tidal Vector Navigation Calculator
Solve the navigational vector triangle to calculate true Course to Steer (CTS), Speed Over Ground (SOG), and compass heading taking into account ocean currents (set & drift) and wind leeway.
Target Course & Environmental Vectors
°True
Course Over Ground (0°–360°).
Knots
Speed Through Water.
°True
Direction toward which water flows.
Knots
Velocity of the tidal stream.
Degrees
+ for wind from Port, - for Starboard.
Deg
+ for East variation, - for West.
Course to Steer (True)
DRIFT ANGLE: 19.5° PORT
070.5° True
Magnetic Compass Heading: 071°M
Speed Over Ground (SOG)
5.66 Knots
STW 6.00 kts (-0.34 kt current drag)
Total Drift Correction
-19.5°
Steer into the current
Navigational Vector Breakdown
Water Track Vector:
070.5° @ 6.0 kts
Tidal Stream Vector:
180.0° @ 2.0 kts
Resultant Ground Track (COG):
090.0° @ 5.66 kts