English > U-boat: 1 sense > noun 1, artifact| Meaning | A submersible warship usually armed with torpedoes. |
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| Synonyms | submarine, pigboat, sub |
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| Parts | conning tower | A raised bridge on a submarine |
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| escape hatch | hatchway that provides a means of escape in an emergency |
| periscope | An optical instrument that provides a view of an otherwise obstructed field |
| snorkel, schnorkel, schnorchel, snorkel breather, breather | air passage provided by a retractable device containing intake and exhaust pipes |
| sonar, echo sounder, asdic | A measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return |
| Narrower | attack submarine | A military submarine designed and armed to attack enemy / enemy shipping |
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| auxiliary research submarine | A submarine for research purposes |
| fleet ballistic missile submarine | A submarine carrying ballistic missiles |
| nautilus, nuclear submarine, nuclear-powered submarine | A submarine that is propelled by nuclear power |
| Broader | submersible, submersible warship | A warship designed to operate under water |
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| Spanish | pigboat, submarino, sumergible, U-boat |
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| Catalan | pigboat, submarí, submergible |
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