Towing & Ship-Assist · Interaction
'Bank effect' on a tow transiting close to one side of a narrow channel tends to:
- APush the bow away from the near bank while the stern is drawn toward it✓ Correct
- BPush the entire vessel straight toward the bank evenly
- CHave no influence on steering
- DIncrease speed over ground
Explanation
Near a bank, a cushion of higher pressure builds at the bow (sheering it away from the bank) while suction draws the stern toward the bank — the combination yaws the vessel. Helmsmen counter with helm and by keeping toward mid-channel where practical.
Authority: Shiphandling; bank effect / cushion and suction
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