The submarine HNMS O 20 of the Royal Dutch Navy. She was lost on 19 Dec 1941.
Technical information
| Type | Submarine |
| Displacement | 1145 / 1561 BRT |
| Length | 80.7m |
| Complement | 40 men |
| Armament | 1 3.5" gun 2 40mm (2x1) 1 12.7mm MG 8 21" torpedo tubes (4 bow, 2 stern, 2 external amidships) 14 torpedoes 40 mines |
| Max speed | 19.5 / 9 knots (surfaced/submerged) |
| Engines | Diesels / Electric, 2 shafts |
| Power | 5300 / 1000 HP (surfaced/submerged) |
| Notes on class | This was the first submarine class in the world equipped with a "snort" (Schnorchel).
Submarines of this class that have detailed patrol info added are shown in bold in the list below. |
Royal Dutch Navy ships of the O 19 class
To see all O 19 class ships click here.
 | HNMS O 19 (N 54) | Lost on 10 Jul 1945 |
| | HNMS O 20 | Lost on 19 Dec 1941 |
Full wartime service history on this vessel. | ||
See all Royal Dutch Navy Submarine classes.
 U-Boats Attack! Jak P. Mallman Showell |
Books dealing with this subject include:
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