Safety Protocols & Emergency Procedures Flashcards
7 cards from real DPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety Protocols & Emergency Procedures flashcards as text
When a DP vessel is operating in 'joystick mode' rather than 'auto DP mode,' what key safety feature is typically lost?
Answer: Automatic position keeping and watch circle alarms
In joystick mode, the automatic position keeping algorithm is inactive, meaning watch circle alarms and automatic correction for environmental disturbances are not operating.
What does the term 'degraded mode' mean in the context of DP operations?
Answer: The DP system is functioning with less than its full design redundancy due to a failure or maintenance
Degraded mode means the DP system is operating with a failure or equipment out of service, reducing it below its designed redundancy level.
Under IMCA guidelines, what must happen before a DP vessel commences operations on a new field or installation for the first time?
Answer: A field approach and operations plan must be agreed between vessel and client
IMCA M 109 requires that an agreed operations plan covering approach routes, limiting conditions, and emergency procedures be established before first operations at a new installation.
What is the main risk of 'biased position references' in a DP system?
Answer: The DP system will drive the vessel to a position that differs from its true location
A biased reference causes the DP system to believe the vessel is in the wrong position, commanding thrust that drives it away from the true target rather than toward it.
A DP operator is handed over a watch and notices the consequence analysis function is showing a 'red' status. What does this indicate?
Answer: The vessel cannot maintain position after a worst case failure with current thruster configuration
Red status on consequence analysis means the vessel's current configuration cannot maintain position following a worst case failure, indicating unacceptable risk for critical operations.
When performing a DP vessel emergency stop (DP E-stop), what is the expected system behavior?
Answer: All thrusters ramp down to zero thrust simultaneously
A DP E-stop commands all thrusters to ramp to zero thrust simultaneously, removing all propulsive force from the vessel.
Which condition would automatically trigger a 'red alert' status on a DP vessel conducting diving operations?
Answer: Vessel excursion beyond the outer watch circle limit
Excursion beyond the outer watch circle limit represents a critical position deviation that automatically triggers a red alert, requiring immediate emergency action.