Towing & Ship-Assist · ATB — Connection System
An articulated tug-barge (ATB) is connected by:
- AWelding the tug into the barge
- BA single nylon towline astern
- CA mechanical pin or ram system in a notch that allows the tug to pitch independently while pushing✓ Correct
- DMagnets along the hull
Explanation
An ATB uses a hydraulic pin or ram coupling seated in a notch at the barge's stern. The connection lets the tug pitch independently in a seaway (articulation) while remaining rigidly coupled in yaw, so the unit pushes like a ship but rides seas better than a rigid composite.
Authority: Towing/ATB engineering references
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