- "The submarines are surfacing and attacking our bombers!"
- ―Wedge Antilles
A submarine was a vehicle designed for use underwater.
- "I could get you a Hydrosphere Explorer if you're prepared to wait a few weeks. An Ubrikkian repulsorsub. A V-Fin. A Trade Federation submarine, even."
- ―A Rodian merchant
- Trade Federation submarines were a dedicated submarine used by the Trade Federation during the Clone Wars.
- The Crab submarine was another vehicle used by the Trade Federation's aquatic navy.
- The Whaladon-hunting submarine was a craft operated by Captain Dunwell on the planet Dac.
- Imperial submarines were used by the Galactic Empire.
- Trident-class assault ships were a Separatist transport used in the Clone Wars.