Abtao 1965
Abtao 1980
| 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 |
|
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 |
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.
Dos de Mayo 1966
Abtao 1975
Dos de Mayo 1986
© Ivan Gogin, 2015