Question 1

An incoming DPO is receiving a handover after a 12-hour watch. The outgoing DPO is clearly fatigued and wants to hand over quickly. He summarises in under a minute: "Position's good, weather's fine, see you in 12." The incoming DPO is relatively junior.

What should the incoming DPO insist on before accepting the watch?

Accepted Answer

A complete structured handover covering: current ASOG status and colour, all active reference systems and their health, gyro agreement, thruster status and any faults, generator configuration and bus status, weather versus ASOG limits, any items outstanding or deferred, and verbal confirmation that the incoming DPO has understood and accepted each item DP watch handover is one of the highest-risk moments in any DP operation. IMCA M117 and multiple incident investigations have identified inadequate handover as a contributing cause of DP incidents — faults not passed on, degraded references not mentioned, ASOG status not communicated. The incoming DPO takes full responsibility for the watch the moment they accept it. If the outgoing DPO is too fatigued to give a proper handover, the correct response is to involve the master, not to accept an inadequate brief. Fatigue in the outgoing DPO is itself a safety signal worth reporting.

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.