HSwMS Delfinen (Swedish: Hans Svenska Örlogsfartyg Delfinen, "His Swedish Majesty's Ship Dolphin") is the name of several submarines that have served in the Royal Swedish Navy. The name "Delfinen" (Dolphin) has been used for three distinct classes of submarines, each including a lead vessel or a vessel within a class bearing the name.
HSwMS Delfinen (1914)
The first HSwMS Delfinen was a submarine commissioned in 1915, the lead ship of the Delfinen-class.
- Class: Delfinen-class submarine
- Operator: Royal Swedish Navy
- Builder: Kockums Mekaniska Verkstad, Malmö
- Laid Down: 1913
- Launched: 1914
- Commissioned: 1915
- Decommissioned: 1929
- Fate: Scrapped
Characteristics:
- Displacement: 260 tons (surfaced), 325 tons (submerged)
- Length: 45.4 meters (149 ft)
- Beam: 4.7 meters (15 ft 5 in)
- Draft: 2.9 meters (9 ft 6 in)
- Propulsion: Diesel engines for surface travel, electric motors for submerged travel
- Speed: 15 knots (28 km/h; 17 mph) surfaced, 9 knots (17 km/h; 10 mph) submerged
- Armament: 2 × 45 cm (18 in) torpedo tubes
- Crew: Approximately 20
HSwMS Delfinen (1936)
The second HSwMS Delfinen was the lead ship of her class, built in the mid-1930s, and served through World War II.
- Class: Delfinen-class submarine
- Operator: Royal Swedish Navy
- Builder: Kockums Mekaniska Verkstad, Malmö
- Laid Down: 1933
- Launched: 1936
- Commissioned: 1936
- Decommissioned: 1957
- Fate: Scrapped
Characteristics:
- Displacement: 540 tons (surfaced), 720 tons (submerged)
- Length: 66 meters (216 ft 6 in)
- Beam: 6.1 meters (20 ft 0 in)
- Draft: 3.8 meters (12 ft 6 in)
- Propulsion: 2 × Diesel engines for surface, 2 × electric motors for submerged
- Speed: 17 knots (31 km/h; 20 mph) surfaced, 9 knots (17 km/h; 10 mph) submerged
- Armament: 4 × 53 cm (21 in) torpedo tubes (bow), 2 × 53 cm (21 in) torpedo tubes (stern), 1 × 5.7 cm (2.2 in) anti-aircraft gun
- Crew: Approximately 35
HSwMS Delfinen (1961)
The third HSwMS Delfinen was the lead ship of a new class of submarines, known as the Delfinen-class, developed after World War II. These submarines represented a significant technological advancement for the Swedish Navy.
- Class: Delfinen-class submarine
- Operator: Royal Swedish Navy
- Builder: Kockums Mekaniska Verkstad, Malmö
- Laid Down: 1957
- Launched: 1961
- Commissioned: 1961
- Decommissioned: 1997
- Fate: Scrapped in 2005 (despite earlier considerations for preservation as a museum ship).
Characteristics:
- Displacement: 800 tons (surfaced), 1,000 tons (submerged)
- Length: 53.6 meters (175 ft 10 in)
- Beam: 6.1 meters (20 ft 0 in)
- Draft: 4.8 meters (15 ft 9 in)
- Propulsion: 2 × Diesel engines for surface, 1 × electric motor for submerged
- Speed: 15 knots (28 km/h; 17 mph) surfaced, 20 knots (37 km/h; 23 mph) submerged
- Armament: 4 × 53 cm (21 in) torpedo tubes (bow)
- Crew: Approximately 28