Towing & Ship-Assist · ATB
An articulated tug-barge (ATB) connects the tug to the barge with a system that allows the tug to:
- AFloat freely on a hawser astern
- BPitch independently while remaining locked in the barge's notch for steering and pushing✓ Correct
- CBe lifted aboard the barge
- DDisconnect only in drydock
Explanation
An ATB uses a mechanical connection (e.g., pin-in-ladder systems) that lets the tug pitch independently of the barge in a seaway while staying rigidly coupled for pushing and steering. This gives near-ship efficiency with the manning and flexibility of a tug-barge.
Authority: Towing technology; ATB systems
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