DPO Safety Regulations & Compliance 2 — Questions and Answers
Question 1: Under IMCA guidelines, what is the minimum frequency for conducting a DP FMEA (Failure Mode and Effects Analysis) review?
- Every 5 years or after major modifications (Correct answer)
- Annually, regardless of vessel changes
- Every 2 years or when the DP system is significantly altered
- Only after a reportable DP incident
Correct answer: Every 5 years or after major modifications
IMCA guidelines recommend a DP FMEA is reviewed every 5 years or following any major modifications to the DP system.
Question 2: Which IMO circular provides the revised guidelines for vessels with dynamic positioning systems?
- MSC/Circ.645
- MSC/Circ.1580 (Correct answer)
- MARPOL Annex VI
- SOLAS Chapter II-1
Correct answer: MSC/Circ.1580
IMO MSC/Circ.1580 (2017) provides the revised guidelines for the design and operation of dynamically positioned vessels, superseding MSC/Circ.645.
Question 3: A DP vessel operating in Class 2 configuration experiences a drive-off caused by a single component failure. Under IMCA reporting requirements, this event must be classified as:
- A minor incident requiring internal log only
- A DP Incident requiring submission to IMCA (Correct answer)
- A near-miss requiring flag state notification within 24 hours
- A critical failure requiring immediate port of refuge
Correct answer: A DP Incident requiring submission to IMCA
A drive-off due to a single component failure on a Class 2 vessel constitutes a DP Incident and must be reported to IMCA via the DP incident reporting scheme.
Question 4: The Consequence Analysis function on a modern DP system is primarily used to:
- Automatically switch the vessel to manual control upon detecting a risk
- Simulate the worst-case equipment failure and assess position-keeping capability (Correct answer)
- Alert the crew when fuel consumption exceeds planned limits
- Calculate optimal heading for weather avoidance
Correct answer: Simulate the worst-case equipment failure and assess position-keeping capability
Consequence Analysis continuously simulates the worst credible failure (WCF) to determine whether the vessel can maintain position if that failure occurred.
Question 5: Under US Coast Guard regulations (33 CFR), DP vessels operating on the US Outer Continental Shelf are required to comply with which standard for DP system design?
- ABS Guide for Dynamic Positioning Systems
- API RP 2SK
- BSEE Notice to Lessees NTL 2009-G22 (Correct answer)
- DNV-ST-0111
Correct answer: BSEE Notice to Lessees NTL 2009-G22
BSEE (Bureau of Safety and Environmental Enforcement) NTL 2009-G22 sets the regulatory requirements for DP vessels operating on the US OCS.
Question 6: In the context of DP operations, a 'Yellow Mode' alert on a DP control system most commonly indicates:
- The vessel has lost all position reference systems
- A non-critical alarm that does not immediately threaten position keeping (Correct answer)
- Authorization to commence diving operations has been granted
- The thruster allocation limit has been exceeded
Correct answer: A non-critical alarm that does not immediately threaten position keeping
Yellow/advisory alarms on DP systems indicate non-critical conditions that require monitoring but do not immediately compromise position keeping ability.
Question 7: Which document establishes the minimum competency standards for Dynamic Positioning Operators recognized internationally?
- STCW Convention Manila Amendments 2010
- IMCA M 117 — Guidance on Competence Assurance and Assessment (Correct answer)
- ILO Maritime Labour Convention 2006
- IMO Model Course 1.39
Correct answer: IMCA M 117 — Guidance on Competence Assurance and Assessment
IMCA M 117 defines the competency standards and assessment criteria for DP operators that are recognized by the NI and other certification bodies.
DPO Safety Regulations & Compliance 2
Under IMCA guidelines, what is the minimum frequency for conducting a DP FMEA (Failure Mode and Effects Analysis) review?