Question 1

An incoming DPO discovers during handover that one of the two DGNSS position reference systems has been showing intermittent dropouts for the past 90 minutes, and the Fanbeam unit is showing reduced confidence due to condensation on the reflector. No one has informed the master. The outgoing DPO says it's "been like this all watch and it's fine."

What should the incoming DPO do before accepting the watch?

Accepted Answer

Refuse to accept the watch until the degraded reference status has been reported to the master and the ASOG status has been formally reassessed in light of the degraded position reference configuration A reference system degradation that has persisted for 90 minutes without being reported to the master is a procedural failure by the outgoing watch. The incoming DPO, by accepting the watch, does not inherit just the position — they inherit the responsibility for the entire situation as it stands. Accepting a watch where the master is unaware of an ongoing ASOG-relevant degradation compounds the failure. The correct action is to jointly inform the master before handover is completed, reassess the ASOG status, and confirm there is a clear plan for the degraded situation before taking the watch.

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.