The DPO is now manually controlling the vessel with no position reference of any kind. What should guide the manual control strategy in this specific moment?

A. Increase speed toward the structure to complete the task before full control is lost

B. Attempt to hold the exact pre-failure position using dead reckoning alone, since this is what the client expects

C. Prioritise increasing standoff distance from the platform/structure using known heading and best-estimate drift direction (wind, current) rather than attempting to hold an exact position with no feedback — the goal shifts from precision station-keeping to maximising clearance and time to recover a reference

D. Shut down all thrusters completely and allow the vessel to drift freely until a reference is restored

A. Immediately switch to manual joystick control regardless of the remaining references' status

B. Confirm the DP system has automatically excluded DGNSS 1 from the position solution and is now running on the two remaining references (DGNSS 2 and Fanbeam); verify the resulting position solution is stable before doing anything else

C. Restart the DGNSS 1 receiver immediately without checking the current position solution first

D. Ignore the dropout since two references remain — no action is required

A. Nothing changes — two references is operationally identical to three for monitoring purposes

B. Increase monitoring vigilance specifically — with only two references, there is no longer a "voting" majority if one of the remaining two starts to disagree, so any divergence between DGNSS 2 and Fanbeam now requires immediate judgement rather than automatic resolution; the DPO should also consider what reference would be left if either of these also fails

C. Immediately suspend operations regardless of how the two remaining references agree

D. Disable the alarm system since fewer references means fewer expected alarms