Rule 39 Special Signals for Dangerous Goods

In the Canadian waters of a roadstead, harbour, river, lake or inland waterway, a vessel that is taking in, discharging or carrying dangerous goods shall,

(a) when not underway, exhibit where it can best be seen, an all-round red light or the International Code flag “B”; and

(b) when underway, exhibit where it can best be seen, the International Code flag “B” but not an all-round red light.