Editing Pennant number (section)

====Flags superior====
Pendant numbers 13 were not allocated to flag superiors. The letters J and K were used with three number combinations due to the number of vessels.
* D — [[destroyer]]s (until 1940), older [[capital ship]]s, [[aircraft carrier]]s, [[cruiser]]s (from 1940)
* F — destroyers (until 1940) and [[Armed merchantman|large auxiliary combatants]] (from 1940)
* G — destroyers (from 1940)
* H — destroyers
* I — aircraft carriers, cruisers (until 1940), destroyers (from 1940)
* J — [[minesweepers]]
* K — [[corvette]]s, [[frigate]]s
* L — [[escort destroyer]]s, [[sloop-of-war|sloops]] (until 1941)
* M — [[minelayer]]s
* N — minesweepers
* P — sloops (until 1939), boom defence vessels (until 1940)
* R — destroyers (from 1942), sloops
* T — [[river gunboat]]s, netlayers
* U — sloops (from 1941)
* W — tugs and salvage vessels
* X — special service vessels
* Z — gate, mooring and boom defence vessels
* 4 — [[Auxiliary ship|auxiliary]] anti-aircraft vessels
* FY — fisheries (auxiliary [[fishing trawler]]s, [[drifter (fishing boat)|drifter]] etc.)