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LOBO submarines (1954-1957)


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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 equipmentSS-2A radar, BQR-3, BQA-1A sonars
Complement

40

Diving depth operational, m 


Standard scale images


<i>Abtao </i>1965
Abtao 1965
<i>Abtao </i>1980
Abtao 1980


Graphics


<i>Dos de Mayo </i>1966
Dos de Mayo 1966
<i>Abtao </i>1975
Abtao 1975
<i>Dos de Mayo </i>1986
Dos de Mayo 1986


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.