Military Wiki

Port squadrons

Type squadrons

Aircraft Carriers




Starting around the time that steam cruisers became popular in the 1870s, the Royal Navy tended to organise such ships into groups called Cruiser Squadrons. Squadrons were commanded by a Rear-Admiral whose title was given as Flag Officer Cruiser Squadron n, or CSn for short (e.g. the officer commanding the 3rd Cruiser Squadron would be CS3).

During peace time the grouping was primarily for administrative purposes, but during war the whole squadron tended to be operated as a unified fighting unit and such units would train in this formation during peace. In the main fighting fleets (Home Fleet and Mediterranean Fleet) members of a given squadron were normally of the same or similar classes. The use of Cruiser Squadrons died out as the number of such ships decreased following World War II.

Defence boats

  • 1st Seaward Defence Boat Squadron



  • 21st Escort Squadron
  • 22nd Escort Squadron
  • 23rd Escort Squadron
  • 24th Escort Squadron
  • 25th Escort Squadron
  • 26th Escort Squadron
  • 27th Escort Squadron
  • 28th Escort Squadron
  • 29th Escort Squadron
  • 30th Escort Squadron

Fast patrol boats

  • 1st Fast Patrol Boat Squadron
  • 2nd Fast Patrol Boat Squadron
  • Fast Patrol Boat Squadron




Coastal minesweepers

  • 100th Minesweeper Squadron
  • 101st Minesweeper Squadron
  • 105th Minesweeper Squadron
  • 106th Minesweeper Squadron
  • 108th Minesweeper Squadron
  • 120th Minesweeper Squadron

Fleet minesweepers

  • 1st Minesweeper Squadron
  • 2nd Minesweeper Squadron
  • 3rd Minesweeper Squadron
  • 4th Minesweeper Squadron
  • 5th Minesweeper Squadron
  • 6th Minesweeper Squadron

Inshore minesweepers

  • 50th Minesweeper Squadron
  • 51st Minesweeper Squadron
  • 52nd Minesweeper Squadron
  • 232nd Minesweeper Squadron

Mine countermeasures

  • 1st Minecountermeasures Squadron
  • 2nd Minecountermeasures Squadron
  • 3rd Minecountermeasures Squadron
  • 5th Minecountermeasures Squadron
  • 6th Minecountermeasures Squadron
  • 7th Minecountermeasures Squadron
  • 8th Minecountermeasures Squadron
  • 9th Minecountermeasures Squadron
  • 10th Minecountermeasures Squadron
  • 11th Minecountermeasures Squadron



  • 2nd Training Squadron
  • 3rd Training Squadron
  • 4th Training Squadron
  • Home Fleet Training Squadron



See Pennant number#Flotilla bands


  • 1st Escort Flotilla
  • 2nd Escort Flotilla
  • 3rd Escort Flotilla
  • 4th Escort Flotilla
  • 5th Escort Flotilla


Motor torpedo boats

  • 10th Motor Torpedo Boats Flotilla
  • 58th Motor Torpedo Boats Flotilla


  • 1st Submarine Flotilla
  • 2nd Submarine Flotilla
  • 3rd Submarine Flotilla
  • 4th Submarine Flotilla
  • 5th Submarine Flotilla
  • 7th Submarine Flotilla, part of Commander-in-Chief, South Atlantic. At Freetown, Sierra Leone, 3 September 1939


  • 2nd Training Flotilla


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