Restricted Visibility

• Recognise restricted visibility early and make a route-level delay, divert or continue decision before detection, pilotage and collision-avoidance margins close.
• Command a coordinated restricted-visibility response without letting position fixing or equipment set-up displace safe speed, lookout, lights, signals and manoeuvring readiness.
• Select the prescribed Rule 35 signal from actual vessel status, making-way state and length, including the under-12-metre alternative and motorsailing boundary.

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.