A vessel experiences a drive-off incident but clears the installation by 150m with no contact, no injury, and no equipment damage. Does this still require reporting to IMCA?

A. Only if the client specifically requests it

B. Yes — an uncontrolled drive-off (thruster runaway causing unintended vessel movement) is a reportable DP incident regardless of whether contact or damage occurred; the absence of consequence does not remove the reporting obligation

C. No — only incidents resulting in contact, injury, or equipment damage require IMCA reporting

D. Only if the drive-off exceeded 50m from the position setpoint

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