BRITISH PHOSPHATE COMMISSIONERS.

The flag is red with a circle divided horizontally blue-white-blue, the white band bearing black “B.P.C.”. The cream funnel with light-blue top is dated to Triaster’s commissioning in 1955. Stewart also attributes B690 to A.H. Gaze.

US Navy 1961 gives blue letters instead of black. Rosanoski assumes the flag’s blue should be darker than the funnel top although the source shows them alike.