Recognition Guide Warships of the Second World War
Royal Navy — Submarine N77

HMS Tetrarch (N77)

British T class submarine

HMS Tetrarch (N77)
Royal Navy official photographer — This photograph FL 5702 comes from the collections of the Imperial War Museums (collection no. 8308-29) — Public domain — Wikimedia Commons Plate — N77 British T class submarine HMSM TETRARCH alongside the coaling jetty at Blyth .

Service

  1. Royal Navy as HMS Tetrarch15 February 1940 — 2 November 1941626 days of the war
British T class submarine Particulars
Name
HMS Tetrarch
Pennant / hull number
N77
Builder
Vickers-Armstrongs, Barrow
Laid down
24 August 1938
Launched
14 November 1939
Commissioned
15 February 1940
Fate
Sunk 2 November 1941 (1941)
Status
Wreck

Specifications

Displacement, surfaced
1,090 long tons (1,107 t)
Displacement, submerged
1,575 long tons (1,600 t)
Length
83.82 m (275 ft)
Beam
7.92 m (26 ft)
Draught
4.97 m (16.3 ft)
Speed
15.3 knots (28.2 km/h, 17.5 mph)
Range
4,500 nmi (8,334 km)
Complement
59
Main gun
102 mm (4 in)

HMS Tetrarch was a British T class submarine of the Royal Navy. She carried the pennant number N77. Vickers-Armstrongs, Barrow laid her keel on 24 August 1938. Launched on 14 November 1939, she entered service on 15 February 1940.

Her class ran to 52 ships. The class followed the Grampus-class submarine and was succeeded by the U class.

The boat displaced 1,090 long tons surfaced and 1,575 long tons submerged. She measured 83.8 m (275 ft) long with a beam of 7.9 m (26 ft). Her designed speed was 15.2 knots, and she carried a complement of 59. Her main battery was of 102 mm (4.0 in) calibre.

She was in commission for 626 days of the Second World War.

She was sunk on 2 November 1941. The wreck survives.

Written from the harvested record. Every figure above is sourced; the wording is this site's own.

Armament and machinery

Armament and machinery
Propulsion
  • Two shafts
  • Twin diesel engines 2,500 hp (1.86 MW) each
  • Twin electric motors 1,450 hp (1.08 MW) each
Armament
  • 6 internal forward-facing 21 in torpedo tubes
  • 4 external forward-facing torpedo tubes
  • 6 reload torpedoes
  • 1 x 4 inch deck gun

Sister ships

27 more in the class

Sources

  • Facts harvested from HMS Tetrarch (N77) on Wikipedia. Figures only — no wording is taken from it.
  • Photograph: Royal Navy official photographer — This photograph FL 5702 comes from the collections of the Imperial War Museums (collection no. 8308-29) — Public domain — Wikimedia Commons