Question 1

A DPO on a DP2 cable-lay vessel is on a lone 6-hour watch. The operations room is on the deck below and the worksite supervisor asks the DPO to come down to review cable tension data on the workstation there. The DP console would be unattended for about 10 minutes.

What should the DPO do?

Accepted Answer

Decline to leave the DP console unattended. The DPO's primary duty is continuous supervision of the DP system during operations. If the worksite supervisor needs input, they should come to the bridge or the information should be relayed remotely — alternatively, a second qualified person must be available to cover the console before the DPO leaves DP console abandonment is a direct violation of DP watchkeeping requirements. DP operations require continuous manned supervision — not because the system cannot operate autonomously in perfect conditions, but because the DPO's role is to detect degrading situations (reference dropouts, thruster fluctuations, weather changes) early enough to respond before they become critical. A 10-minute absence removes the human element of the control loop entirely. IMCA M117 requires the DP watch position to be continuously manned. The "calm conditions" argument is particularly dangerous — it is exactly the moment when normalisation of deviance creates an opening for an undetected fault.

Question 2

A trainee DPO asks why the vessel has an Activity Specific Operations Guideline (ASOG) for each job, given that the vessel already has a general DP Operations Manual.

What is the primary purpose of an ASOG, and who is responsible for setting its limits?

Accepted Answer

The ASOG translates general vessel DP capability into specific, agreed criteria for a particular operation and worksite — weather limits, reference system minimums, thruster requirements, and alert zones. It is developed jointly by the vessel operator and the client/installation authority for each specific operation The ASOG (Activity Specific Operations Guideline) is the critical bridge between the vessel's certified DP capability and the specific risks of a particular operation. General capability is not enough — a vessel might be able to hold position in 35 knots open sea, but the same vessel near a fixed structure with a riser connected may need to abort at 20 knots to prevent structural damage. The ASOG sets specific go/no-go limits for that job, agreed between the vessel operator and the client, and defines what combination of failures requires an immediate disconnect or abort. It must be site-specific and operation-specific.

Question 3

During a sensitive DP operation, the lead DPO briefs the incoming watch DPO: "We're currently Green. If we go Yellow, I want to know immediately." A junior watch officer overhears and asks what the Green/Yellow/Red system actually means.

Which statement best describes the ASOG traffic light alert system?

Accepted Answer

Green means operations can continue normally within all ASOG limits; Yellow means a limiting parameter has been reached or a degradation has occurred and the DPO must assess whether to continue — typically with master informed; Red means the abort criteria have been met and operations must stop or disconnect immediately The ASOG traffic light system gives DPOs an immediately understandable status framework. Green = operate normally within all defined limits. Yellow = a defined threshold has been crossed (weather approaching limit, reference system degraded, thruster fault) — the master must be informed, monitoring intensifies, and the DPO must be ready to abort. Red = abort criteria met — operations stop, disconnect sequence initiated. The criteria for each colour are defined in the operation-specific ASOG, not by generic rules. The handover briefing must always include current ASOG status.