Navigation (Collision) Regulations 1983
Repealed version for 2 August 1996 to 29 March 2009 (accessed 3 July 2020 at 09:14)
7   Pilot day signal
A vessel engaged on pilotage duty when underway shall exhibit by day a flag of a size not less than 900 mm × 600 mm divided horizontally in 2 colours (the upper half being white and the lower half being red).