Towing & Ship-Assist · ATB vs Conventional
An articulated tug-barge (ATB) differs from a conventional hawser tow in that the tug is:
- ATowed behind the barge
- BWelded permanently to the barge
- CMechanically connected into a notch in the barge's stern, free to pitch but coupled in yaw✓ Correct
- DNot crewed
Explanation
An ATB uses a pin/ram or wire system to lock the tug into the barge's notch, allowing relative pitch but holding the unit together for steering. An integrated tug-barge (ITB) is more rigidly joined; a conventional tow uses a hawser astern.
Authority: Towing practice; vessel design
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