The locking plates shown in the illustration are used in many marine applications. Which figure indicates the improper method for using these devices? GS-0156

Correct Answer: Option A — "C"

Locking plates must be installed to prevent fastener rotation by physically obstructing the bolt head. Figure C shows an improper application where the plate does not effectively lock the fastener against the mounting surface, failing to provide the necessary mechanical security required for high-vibration marine machinery environments.