| Property | Value |
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| rdfs:comment | - {{Infobox ship | Ship image = File:Chegada do submarino NRP Tridente à Base Naval do Alfeite.jpg | Ship caption = NRP Tridente at the Lisbon Naval Base |module= Class overview Builders: HDWOperators: Preceded by: Albacora class submarinesBuilding: oPlanned: 3Completed: 2Cancelled: 1 |module2= |} The Tridente class, also designated as U 209PN, is a diesel-electric submarine class based on the Type 214 submarine developed by Howaldtswerke-Deutsche Werft GmbH (HDW) for the Portuguese Navy.
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| dbkwik:military/property/wikiPageUsesTemplate | |
| Ship test depth | |
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| embed | |
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| Ship capacity | |
| Ship sensors | - Atlas Elektronik GmbH ISUS 90 combat management system
- Kelvin Hughes KH-1007 navigation radar
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| Total ships cancelled | |
| Ship complement | |
| Ship propulsion | - Diesel-electric, fuel cell AIP, low noise skew back propeller
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| Ship endurance | |
| Class before | |
| Ship speed | - submerged
- surfaced
- AIP system
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| abstract | - {{Infobox ship | Ship image = File:Chegada do submarino NRP Tridente à Base Naval do Alfeite.jpg | Ship caption = NRP Tridente at the Lisbon Naval Base |module= Class overview Builders: HDWOperators: Preceded by: Albacora class submarinesBuilding: oPlanned: 3Completed: 2Cancelled: 1 |module2= |} The Tridente class, also designated as U 209PN, is a diesel-electric submarine class based on the Type 214 submarine developed by Howaldtswerke-Deutsche Werft GmbH (HDW) for the Portuguese Navy. This class of submarines was acquired by Portugal to replace the last submarines of the Albacora class, then being operated by the navy. Originally, HDW proposed the Type 209 submarine (U-209) during the competition, but decided to later enter a new proposal based on the Type 214. It is for this reason that the Tridente class is commonly designated as the U 209PN. The class and its ships are the first to not be named after marine animals, thus breaking a tradition retracing back to 1913, when the first submarine entered service with the Portuguese Navy.
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