Position, Course & Speed

• Transfer a position in degrees and decimal minutes between independent sources without confusing coordinate precision, chart scale and real positional accuracy.
• Keep bearing, course, heading, water track and ground track distinct, then carry a known position forward as a labelled DR or EP without presenting an estimate as a fix.
• Use compatible speed, distance and time units to calculate an ETA or distance made good, then monitor the assumption before it becomes a tidal or daylight failure.

A self-guided revision companion that explains essential concepts, then helps you practise and test them. It supports—but does not replace—recognised instruction, practical training, assessment or certification. Access is a one-time payment, not a subscription.