June 1997. The Aliaga. Photo by H. Ehlers.

Country: Bulgaria.
Class, [Type]: Romeo ( Project 633 ), [SS].

Builder: Shipyard Red Sormovo named Zhdanov, Nizhny Novgorod, USSR.
Launch date: 31 May 1960.
Commission date: 5 February 1973.
Decommission date: 5 September 1990.

Displacement ( tons ): 1500 surfaced, 1700 submerged.
Dimensions ( metres ): 76,7 x 6,7 x 5.
Main machinery: 2 x 37D diesels ( 4000 hp ), 2 x PG-101 electric motors ( 4000 hp ).
Speed ( knots ): 15,3 surfaced, 13,2 submerged.
Complement: 52 ( 9 officers ).
Test depth ( м ): 300.

Torpedoes: 6 x 1 533mm torpedo tubes ( 4 bow, 2 stern ); 12 toprpedoes or 28 МDT mines.

Comment: Ex-Soviet NAVY S-212, ex-Dimitrovsky Komsomol ( 82 ).