1. Day Skipper
In IALA Region A, what colour is a port-hand mark?
2. Marine Radio SRC
What is VHF Channel 70 used for?
3. Coastal Skipper
For a simple depth check, what do you add to charted depth?
4. VHF procedure
Which priority signal is used for grave and imminent danger?
5. Lights
What does an isophase light display?