Why are both an alarm log and a position log required on a DP vessel, and why does each serve a distinct investigation purpose?

A. The alarm log records what the system detected and when (equipment/system state timeline); the position log records where the vessel was over time (movement/excursion timeline). Post-incident investigation needs both — what was signalled, and what the vessel actually did in response

B. They are legally required duplicates of the same information maintained for redundancy

C. Only the alarm log is required; the position log is optional good practice

D. The alarm log is for the Chief Engineer; the position log is for the DPO — they are never cross-referenced

A. The classification depends on who set the alarm, not on the severity of the condition

B. All DP alarms are treated equally — they all require the same response

C. DP alarms only have two categories: operational and engineering

D. High-priority (Category 1): requires immediate action — position-critical failure or imminent risk; Medium-priority (Category 2): requires prompt attention — reference degraded, thruster fault; Low-priority (Category 3): advisory — condition monitor, early warning. Each category drives a different urgency of response

A. Alarm flooding occurs when the alarm speaker volume is set too high

B. Alarm flooding only occurs in integrated bridge systems, not standalone DP consoles

C. Alarm flooding is beneficial because it ensures the DPO is alerted to all conditions simultaneously

D. Alarm flooding occurs when multiple alarms activate simultaneously or in rapid succession, overwhelming the operator's ability to diagnose the root cause — in DP, this can mask the critical alarm that actually predicts position loss, causing the DPO to miss the most important signal among the noise