Royal Navy Commissioning Pennant
In the Royal Navy the 'commissioning pennant' (which is also called a commissioning pendant) is exactly what it says, and indicates no more nor less than the ship flying it is a warship 'in commission' and not one which is 'in reserve'. It also has the extra benefit of telling an interested observer that the ship flying it is a "private ship" and does not have a Commodore or Admiral on board. This example we were advised came from the ‘O’ class submarine HMS Osiris pennant number S18, which was commissioned in 1962 and sold to Canada in 1992. It is in excellent issued condition and marked beside the wooden toggle 5419971 and on reverse 3 YD BK. Extended it measures 108” (274 cm) which we feel may be a trifle long for submarine use.