Towing & Ship-Assist · Gear & Makeup
An articulated tug-barge (ATB) unit connects the tug to the barge by:
- AA long synthetic hawser only
- BWelding the two hulls permanently together
- CA mechanical connection in a notch at the barge's stern that allows the tug to pitch but holds it for steering and propulsion✓ Correct
- DMagnets along the waterline
Explanation
An ATB uses a mechanical coupling (e.g., a pin-in-ladder system) seating the tug in a notch at the stern of the barge. The connection permits relative pitch in a seaway while keeping the unit rigid enough in yaw to steer and push as one.
Authority: Bowditch (Pub. No. 9)
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