TR-1700 class submarine
TR-1700 submarine ARA Santa Cruz (S-41) at Base Naval Mar del Plata.
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| Class overview | |
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| Builders: | Thyssen Nordseewerke, Emden, Germany |
| Operators: |
 Argentine Navy
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| In commission: | 1984-present |
| Planned: | 6 |
| Completed: | 2 |
| Cancelled: | 2 |
| Active: | 1 |
| Laid up: | 2 |
| Lost: | 1 |
| General characteristics | |
| Type: | Submarine |
| Displacement: |
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| Length: | 67.30 m (220 ft 10 in) |
| Beam: | 8.36 m (27 ft 5 in) |
| Draught: | 6.5 m (21 ft 4 in) |
| Propulsion: |
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| Speed: |
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| Range: | 12,000 nmi (22,000 km; 14,000 mi) at 8 kn (15 km/h; 9.2 mph) surfaced |
| Endurance: | 30 days |
| Test depth: | 300 m (980 ft) |
| Complement: | 26 |
| Sensors and processing systems: |
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| Armament: |
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The TR-1700 (Santa Cruz) is a class of diesel-electric patrol submarines built by Thyssen Nordseewerke for the Argentine Navy in the 1980s. These ships are amongst the largest submarines built in Germany since World War II and are among the fastest diesel-electric submarines in the world.
The original 1977 plan called for six boats, two TR-1700s built in Germany by Thyssen Nordseewerke, two in Argentina by Astillero Domecq Garcia, and two smaller TR-1400s also built in Argentina. The final agreement in 1982 was modified to six TR-1700s, with the last four to be built in Argentina. The TR-1700s to be built in Argentina were considered for an upgrade to a nuclear submarine using INVAP's CAREM reactor, which began development at that time. The nuclear submarine project never came to fruition, despite later attempts to revive it.
The submarine was designed by Thyssen and its features include high underwater speed, endurance (for a diesel submarine), and survivability. The boat's four MTU diesel engines, four generators, and Siemens electric motor can propel it at speeds up to 25 knots (46 km/h; 29 mph). Eight 120-cell batteries are installed on each boat. They have a diving depth of 300 m (980 ft). Normal endurance of these boats is 30 days with an extended range up to 70 days. These boats are equipped to accept a Deep Submergence Rescue Vehicle (DSRV). Armaments include six bow 533 mm (21 in) torpedo tubes and 22 SST (Special Surface Target) or Mark 37 torpedo. The automatic torpedo reload system can reload the tubes in 50 seconds.
Thyssen proposed the TR1700A for the Australian Collins-class submarine program. The proposed design had a reworked pressure hull, was six meters longer, and half a meter wider than the TR-1700s built for Argentina. It lost to the Type 471 from Kockums, an enlarged Västergötland-class submarine.
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