The Albacora class was a diesel-electric attack submarine (SSK) developed for the Portuguese Navy based on the French Daphné class.

Albacora-class submarine Ghazi (S-134), former Portuguese Navy Cachalote (S-165)
Class overview
Name	Albacora
Builders	Ateliers Dubigeòn-Normándie
Operators	Portuguese Navy  Pakistan Navy
Preceded by	Neptuno class
Succeeded by	Tridente class
In commission	1967–2010
Completed	4
Retired	4
Preserved	1
General characteristics
Type	Submarine
Displacement	860 tons surfaced 1,043 tons submerged
Length	57.8 m (189.6 ft)
Beam	6.8 m (22.3 ft)
Draught	5.2 m (17.1 ft)
Propulsion	Diesel-electric, two shafts, 2,450Cv/Hp 2 × SEMT Pielstick (12 PA4 185) 2 × AREVA electric alternate
Speed	Submerged: 16 knots (30 km/h) Surfaced: 13.5 knots (25.0 km/h)
Range	Surfaced: 2,700 nmi (5,000 km) at 12 knots (22 km/h)
Complement	54
Armament	12 × 21.7 in (551 mm) DaphneTT-550 torpedo tubes (8 bow, 4 stern), 12 torpedoes

In 1964, the Portuguese government ordered the construction of four of this class at the Dubigeòn-Normándie Shipyard to create the 4th Submarine Flotilla.

With the first submarine commissioned on 1 October 1967, the Portuguese Navy started to have a submarine able to operate in both coastal and oceanic zones, especially in the Portuguese exclusive economic zone.

The last Albacora-class submarine in service, NRP Barracuda, made its final mission in 2010. The class was replaced by two Type 209PN/Type 214PN submarines.