Rule 29

Pilot vessel or vessels with a pilot aboard may display the international code flag 'H', this has the meaning-"I have a pilot aboard." Ferries may display a similar flag but the colours are white above red horizontal bands, this indicates that the master is a pilot.
	At night pilot vessels display all round white over red lights. (WHITE OVER RED-PILOT AHEAD)
Pilot vessels never display a masthead light, so you can not determine the length of the vessel.
	It may be difficult to differentiate a pilot vessel at anchor from one seen from astern. Usually the speed of the vessel will indicate one making way.

Sailtrain.co.uk is free to use, but if you feel you would like to contribute to the running and development costs you can donate via Paypal:

Additional Resources: