NAVYPEDIA

Photo

Dos de Mayo 1966

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Lobo, 1960- Dos de Mayo	S41		Electric Boat, Groton, USA	12.5.1952	6.2.1954	14.6.1954	discarded 5.1999
Tiburón, 1960- Abtao	S42		Electric Boat, Groton, USA	12.5.1952	27.10.1953	20.2.1954	discarded 5.1999
Atún, 1960- Angamos	S43		Electric Boat, Groton, USA	27.10.1955	5.2.1957	1.7.1957	discarded early 1990
Merlín, 1960- Iquique	S44		Electric Boat, Groton, USA	27.10.1955	5.2.1957	10.10.1957	discarded early 1993

Technical data

Displacement standard, t
Displacement normal, t	815 / 1400
Length, m	74.1
Breadth, m	6.70
Draught, m	4.30 max
No of shafts	2
Machinery	2 General Motors 12-278A diesel-generators, 2 electric motors
Power, h. p.	2400
Max speed, kts	16 / 10
Fuel, t	diesel oil 45
Endurance, nm(kts)	5000(10) /
Armament	S41, 42: 1 x 1 - 127/25 Mk 40, 6 - 533 TT (4 bow, 2 aft) S43, 44: 6 - 533 TT (4 bow, 2 aft)
Electronic equipment	SS-2A radar, BQR-3, BQA-1A sonars
Complement	40
Diving depth operational, m

Standard scale images

Graphics

Project history

Modification of the wartime US Mackerel design.

Modernizations

1965, Dos de Mayo, Abtao; 1968, Angamos, Iquique: fin was rebuilt

1981, Dos de Mayo, Abtao: - BQR-3, BQA-1A sonars; + EDO1102/1105 sonar suite

1980s, all: + ECM suite

Naval service

No significant events.