What statement is true concerning the 'MS 1' contacts of the master switch shown in the illustration? EL-0102

Correct Answer: Option A — They are closed only when the master switch is 'off'.

Auxiliary contacts such as MS 1 in marine master switches are mechanically linked to the control drum. They are specifically configured to close only when the control handle is returned to the absolute off position, enabling proper circuit interlocking and homing logic.