Towing & Ship-Assist · Ship-Assist
During escort towing at speed, the principal forces the escort tug develops to steer or stop the ship come from:
- AIts engines alone (direct thrust)
- BHydrodynamic lift and drag on the tug's hull and skeg as it presents an angle to the water flow (indirect mode)✓ Correct
- CThe ship's bow thruster
- DThe anchor
Explanation
At escort speeds, an escort tug generates steering and braking forces far exceeding its bollard pull by angling its hull/skeg to the flow, so water pressure does the work (indirect towing). The tug's power is used mainly to hold the attitude, not to push directly.
Authority: Escort towing principles
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