MARITIME – DEAD RECKONING & COATAL NAVIGATION CALCULATOR
Course To Steer
A precise tool.
What is the Course To Steer & How does it work?
Dead reckoning is the process of estimating a vesselβs position by projecting its course and speed from a known point, assuming no external forces act on the craft. In coastal navigation, the navigator must correct the intended track for leeway β the sideways drift caused by wind and hull shape β and for the set and drift of currents. By combining these corrections, the Course to Steer (CTS) ensures the vessel arrives on the desired track despite environmental influences.
\text{CTS}=\text{CD}+L+\arcsin\left(\frac{C\sin(\theta_c-\text{CD})}{V}\right)
CTS = Course to Steer (Β°)
CD = Desired Course (Β°)
L = Leeway angle (Β°)
C = Current speed (knots)
ΞΈ_c = Current direction (Β°)
V = Speed Through Water (knots)
CD = Desired Course (Β°)
L = Leeway angle (Β°)
C = Current speed (knots)
ΞΈ_c = Current direction (Β°)
V = Speed Through Water (knots)
Parameters
Result
β
Frequently Asked Questions
What is Course to Steer in maritime navigation?
Course to Steer (CTS) is the heading a vessel should follow to arrive at its intended destination, compensating for factors like wind, hull shape, and ocean currents.
How do I calculate Course to Steer?
To calculate CTS, add the leeway correction to the desired course. This ensures your vessel stays on track despite environmental influences.
Why is leeway important in maritime navigation?
Leeway is crucial because it accounts for the sideways drift caused by wind pushing against the hull, which can alter a vessel’s path if not corrected.
What does ‘set and drift’ mean in maritime terms?
Set refers to the direction of the current, while drift is the speed. Together, they indicate how much and in what direction the current will move your vessel off course.
How do I determine leeway for my vessel?
Leeway can be determined through experience or by using a wind vane to measure the angle between the wind direction and the vessel’s heading at various speeds.
Can Course to Steer be used in open ocean navigation?
Yes, CTS is essential for open ocean navigation as well, helping vessels maintain their course despite wind and current effects.
What are the benefits of using a Course to Steer calculator?
Using a CTS calculator helps navigators make accurate adjustments to their vessel’s heading, ensuring they reach their destination efficiently and safely.
Results are for informational purposes only and do not constitute professional advice.