Question 1

During a DP audit, the auditor reviews the DP logbook and finds entries like "weather calm, position good, all systems normal" repeated across multiple watches. No reference system status, gyro readings, or ASOG status are recorded.

What is the purpose of the DP logbook and why are these entries inadequate?

Accepted Answer

The DP logbook must capture the actual system state at defined intervals: reference systems in use and their confidence level, gyro readings and agreement, thruster status, generator configuration, weather versus ASOG limits, and any deviations. Generic entries provide no evidence that the watch was actively managed and no data for incident investigation or trend analysis The DP logbook serves two purposes: it is a real-time watchkeeping discipline tool (forcing the DPO to actively check and record system status at regular intervals), and it is the primary evidence trail for incident investigation. "All normal" entries tell investigators nothing about what configuration the vessel was in, which references were active, what the weather was doing, or whether any deviations from ASOG were occurring. IMCA M117 and most company SMS manuals specify minimum logbook entry content. Inadequate logbook entries are also a significant deficiency finding during class and client DP audits.

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.