What is the safety concern with leaving a mooring winch in automatic self-tensioning mode while alongside in conditions with passing vessel traffic or surge?

A. Self-tensioning mode physically cannot be disabled once activated, regardless of conditions

B. Self-tensioning mode has no safety implications and is always preferable in every condition

C. The concern only applies to container terminals, never to other berth types

D. Self-tensioning mode automatically pays out or hauls in line to maintain a set tension, which can mean the winch repeatedly pays out line in response to surge from passing traffic, potentially allowing the vessel to move further off the berth than intended without any alarm — many operators require winches in manual/brake mode during periods of known surge risk specifically to prevent this creeping movement

A. Breast lines and spring lines serve identical functions and the names are interchangeable

B. A breast line is always made of wire while a spring line is always made of synthetic rope, by definition

C. A spring line is only used when departing, never when arriving or staying alongside

D. A breast line runs roughly perpendicular to the vessel's centreline, primarily resisting movement away from or toward the berth (off/onshore movement); a spring line runs roughly parallel to the berth, primarily resisting fore-and-aft movement along the berth

A. Lines are typically let go in an order that keeps the vessel controlled throughout the process — often retaining a spring (and sometimes a breast line) until last to control the vessel's swing or to use the spring itself to assist pivoting the bow or stern off the berth, rather than releasing all lines simultaneously and losing control of the vessel's position relative to the berth

B. The order of letting go has no effect on vessel control and is purely a matter of crew convenience

C. Lines must always be let go in the exact reverse order they were made fast, with no exceptions

D. All lines should always be let go simultaneously regardless of conditions, to minimise time alongside