After a drive-off incident has been arrested in joystick/manual mode and the runaway thruster isolated, what must happen before the vessel can return to DP auto mode and resume station?

A. Return to DP auto is only possible after the runaway thruster is repaired and back online

B. The DPO can re-engage DP auto immediately once the vessel has stopped moving

C. Returning to DP auto is at the DPO's sole discretion once the fault is cleared

D. A consequence analysis must be carried out with the updated thruster configuration (new WCF with the isolated thruster), a new ASOG set for the reduced capability, and OIM/client agreement obtained before returning to the previous working distance

A. A drive-off occurs during manual joystick mode; a drift-off only occurs in DP auto mode

B. A drift-off is always slower than a drive-off

C. A drive-off occurs when a thruster malfunction or DP system error actively propels the vessel away from position against the operator's intent; a drift-off occurs when power or thrust is lost and the vessel moves passively under environmental forces

D. They are two terms for the same event — the vessel leaves its position in both cases

A. Because drive-offs only occur in bad weather when the vessel is already at risk

B. Because a drift-off always results in a controlled shutdown, whereas a drive-off does not

C. Because thruster power is being applied in the wrong direction, accelerating the vessel toward (or away from) the structure — the vessel gains speed rapidly and the DPO has very little time to stop it before impact

D. Because drift-offs are automatically detected by the DP system and corrected; drive-offs are not