fighting ships of the world



G1 submarines (1941/1947)

G7 1947

Name No Builder Laid down Launched Comp Fate
G1   SECN, Cartagena 18/5/1953 --- --- cancelled 10/1961
G7 (ex-U573) S01 Blohm & Voss, Hamburg, Germany 6/1940 17/4/1941 6/1941 // 11/1947 stricken 5/1970


Displacement standard, t


Displacement normal, t

769 / 1070

Length, m


Breadth, m


Draught, m


No of shafts



2 Germania diesels / 2 BBC electric motors

Power, h. p.

2800 / 750

Max speed, kn

17 / 7.6

Fuel, t

diesel oil 114

Endurance, nm(kts) 8500(10) / 80(4)


1 x 1 - 88/45 SK C/35, 1 x 1 - 20/65 C/38, 5 - 533 TT (4 bow, 1 stern, 14 or 36 mines)



Diving depth operational, m 100

Ship project history: German submarines of VIIC series. Negotiations about building of 6 such boats in Spain were conducted with Germans since early 1940, contract has been signed in July, 1941. G1-6 were authorized by the decree from 25/9/1941, works in Cartagena were begun in autumn of the same year. Spanish designation of design is project 16. Germany should deliver machinery and materials for first 4 submarines, including construction steel. Failure of deliveries owing to crash of "Third Reich" led to program failure. After war Spaniards tried to redesign project with usage of own materials. 1/2/1949 G5 and G6 were cancelled, and the order for four first submarines was renewed 15/3/1949. Really building was beyond the power for Spanish industry and works were limited by building of hull sections for two submarines, though G1 was formally laid down 18/5/1953. In 1955 building was completely stopped, ultimately G1-4 were cancelled 20/10/1961.
Unique submarine of VIIC series commissioned by Spanish Navy became former German U573, damaged 1/5/1942 by British aircraft and arrived to Cartagena next day. She was not interned and has been put into repair at Cartagena, but later bought by Spain. Boat was transferred to Spanish crew 2/8/1942, receiving name G7. She was under repair five years and commissioned by Navy only 5/11/1947, then more than decade she was the most efficient Spanish submarine.

Modernizations: early 1950s, G7: - 1 x 1 - 20/65

Naval service: No significant events.

G7 1952

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