Definition
Run a known distance in both directions to cancel tide, using a measured mile with transit marks or a GNSS-derived leg in calm water, and compare log distance with actual. The correction percentage is the actual distance divided by logged distance, multiplied by one hundred. Average the reciprocal runs rather than trusting one. Repeat in similar loading and trim, since heel and speed affect the sensor's position within the hull's boundary layer.
Want to apply this on the water?
Ask Saily out loud for an example, a scenario or a simpler explanation.
Talk to Saily