The Protefs class (referred to as the Proteus class in some sources) was a group of submarines built for the Hellenic Navy in the late 1920s. The boats were built to a Loire-Simonot design in France and were larger than the preceding Katsonis class built by a different French company.
Quick Facts Class overview, General characteristics ...
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| Class overview |
|---|
| Name | Protefs class |
| Builders | Chantiers de la Loire shipyard[1] |
| Operators | Hellenic Navy |
| Preceded by | Katsonis |
| Built | 1928–1929 |
| In commission | 1929–1945[1] |
| Completed | 4[1] |
| Lost | 3 |
| Retired | 1 |
| General characteristics |
|---|
| Type | Submarine |
| Displacement |
- surfaced: 750 tons;
- submerged: 960 tons
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| Length | 68.6 m (225 ft) |
| Beam | 5.73 m (18.8 ft) |
| Draft | 4.18 m (13.7 ft) |
| Propulsion |
- two-shaft Sulzer diesel engines;
- two electric engine motors;
- 1420bhp, 1,200 shp[1]
|
| Speed |
- surfaced: 14 kn (26 km/h; 16 mph)
- submerged: 9.5 kn (17.6 km/h; 10.9 mph)[1]
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| Range | 3,500 nmi (6,500 km; 4,000 mi) surfaced @ 10 kn (19 km/h; 12 mph)[1] |
| Endurance | 100 nmi (190 km; 120 mi) submerged @ 5 kn (9.3 km/h; 5.8 mph)[1] |
| Test depth | 260 ft (80 m)[1] |
| Complement | 41 |
| Armament |
- 6 × 21-inch (533 mm) internal bow T/T,
- 2 × 21-inch (533 mm) Internal stern T/T;
- 1 × 100 mm gun, 1 x 3pdr AA gun
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Four boats were built, all were named after sea gods from Greek mythology.
More information Ship, Builder ...
| Ship | Builder | Launched | Fate |
| Protefs (Y3) Πρωτεύς | AC de la Loire | 24 October 1927 | sunk 19 December 1940, rammed by Italian torpedo boat Antares off Valona, Albania |
| Nirefs (Y4) Νηρεύς | AC de la Loire | December 1927 | Decommissioned 1945 |
| Triton (Y5) Τρίτων) | AC de la Loire | 4 April 1928 | sunk 16 November 1942 by German patrol boat UJ2102 near Euboea |
| Glafkos (Y6) Γλαύκος | Chantiers Navales Français Blainville | 1928 | Lost 4 April 1942 |
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The three boats which survived the fall of Greece in 1941 served under overall Royal Navy control in the Eastern Mediterranean.