| Career (German Empire) | |
|---|---|
| Name: | U-84 |
| Ordered: | 23 June 1915 |
| Builder: | Germaniawerft, Kiel |
| Yard number: | Werk 254 |
| Laid down: | 25 October 1915 |
| Launched: | 22 July 1916 |
| Commissioned: | 7 October 1916 |
| Fate: | 26 January 1918 - Possibly rammed and depth charged by PC62 in St George's Channel and sunk at . 40 dead (all hands lost).[1] |
| General characteristics | |
| Class and type: | German Type U 81 submarine |
| Displacement: | 808 tons (surfaced) 946 tons (submerged) 1160 tons (total) |
| Length: | 70.06 m (overall) 55.55 m (pressure hull) |
| Beam: | 6.30 m (overall) 4.15 m (pressure hull) |
| Draught: | 4.02 m |
| Propulsion: | 2400 hp (surfaced) 1200 hp (submerged) |
| Speed: | 16.8 knots (surfaced) 9.1 knots (submerged) |
| Range: | 11,220 miles @ 8 knots (surfaced) 56 miles @ 5 knots(submerged) |
| Complement: | 39 men |
| Armament: | 12 torpedoes (4/2 in bow/stern tubes) 105mm deck gun with 140 rounds [2] |
| Service record | |
| Part of: | Imperial German Navy |
| Commanders: | Walter Roehr [1] 17 Oct 1916 - 26 Jan 1918 |
| Operations: | 8 patrols 3 Dec 1916 - 26 Jan 1918 IV Flotilla 28 ships sunk for a total of 83,127 tons. 7 ships damaged for a total of 42,149 tons. 2 ships taken as prize for a total of 3,462 tons. |
SM U-84 was one of the 329 submarines serving in the Imperial German Navy (Kaiserliche Marine) in World War I. U-84 was engaged in the naval warfare and took part in the First Battle of the Atlantic.[3]
Initially U 81 to U 83 had one 10.5 cm gun with 140-240 rounds. U 84 - U 86 on the other hand had two 8.8 cm guns. In 1917 U 84 - U 86 were refitted with a single 10.5 cm gun (240 rounds)[1]
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