Question 1

A DPO on watch observes a rapid weather deterioration that, in her judgement, is about to breach the ASOG red abort limit. The master is not immediately reachable and the worksite supervisor is on the radio saying "hold on, just a few more minutes." The ASOG limit is breached.

Does the DPO have the authority to initiate the abort sequence without first obtaining the master's approval?

Accepted Answer

Yes — when the ASOG red abort criteria are met, the DPO has both the authority and the professional duty to initiate the abort sequence immediately, without waiting for the master or the worksite supervisor. The master must be informed as quickly as possible, but the abort does not wait for approval The ASOG red criteria are pre-agreed abort triggers precisely so that individual DPOs do not have to seek approval in a time-critical emergency. When red criteria are met, the abort sequence is not discretionary — it is mandated by the procedures the master and client have already signed. Waiting for authorisation when weather is deteriorating rapidly is itself a violation of the ASOG. The DPO's professional authority to initiate an emergency disconnect is a fundamental feature of the DP watchkeeping system — and the basis for the Nautical Institute DP certification scheme's competence requirements. Inform the master at the same time as, not before, the abort.

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.