Towing & Ship-Assist · Ship-Assist & Escort
A 'tractor tug' achieves its exceptional maneuverability because its propulsion units are:
- AFixed shafts and rudders at the stern, like a conventional vessel
- BLocated forward of amidships (Voith-Schneider or azimuthing) and can vector thrust in any direction✓ Correct
- CA single outboard motor
- DSails supplemented by a small engine
Explanation
Tractor tugs carry their omnidirectional drives (Voith-Schneider cycloidal or azimuthing units) forward of amidships and tow over the stern. Vectoring thrust in any direction gives them the agility and 'indirect' towing ability prized in ship assist and escort.
Authority: Bowditch (Pub. No. 9)
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