Free Practice Questions for DPO

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card

113+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More Dynamic Positioning Certifications

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

IMCA DP Trials and Assurance Practitioner

Practice Questions100 questions

Exam Review

Key Facts: DPO Exam

40 MCQs / 70%

Phase A online exam

NI February 2026 standard

1 h 15 min

Phase A time

NI February 2026 standard

5 phases

New Offshore Scheme

The Nautical Institute

Online + practical

Phase C assessments

NI February 2026 standard

Not published

Universal domain weights

NI standard reviewed

5 years

Certificate revalidation cycle

The Nautical Institute

The NI DPO Certificate is earned through Phases A-E, not one universal exam. Phase A uses a 40-question online examination in 1 hour 15 minutes with a 70% pass mark. Phase C includes both an online examination and simulator practical assessment. Phases B and D require verified DP sea time and tasks, and Phase E is the Statement of Suitability. NI publishes course objectives but no universal domain-percentage blueprint or scheme-wide score.

Sample DPO Practice Questions

Try these sample questions to review concepts for the DPO exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 113+ question experience with AI tutoring.

1Which organisation administers the dominant global certification scheme for individual Dynamic Positioning Operators (DPOs)?

A.The Nautical Institute (NI)

B.The International Marine Contractors Association (IMCA)

C.The International Maritime Organization (IMO)

D.The Dynamic Positioning Vessel Owners Association (DPVOA)

Explanation: The Nautical Institute (NI) in London administers the DP Operator certification scheme and issues the DPO logbook and certificate. IMCA publishes guidance (M103, M117) but does not certify individual DPOs.

2Under the Nautical Institute DP scheme, in which phase does the trainee complete the DP Induction Course and its online invigilated assessment?

A.Phase C

B.Phase A

C.Phase D

D.Phase E

Explanation: Phase A is the DP Induction Course, which ends with an online invigilated multiple-choice assessment. Phase C is the Simulator Course, and Phases B and D are the DP sea-time periods.

3The DP Induction Course online assessment under the NI scheme consists of approximately 40 multiple-choice questions. What is the pass mark?

A.50%

B.60%

C.70%

D.80%

Explanation: The NI DP Induction assessment is around 40 MCQs to be completed in about 1 hour 15 minutes with a 70% pass mark.

4What is the primary purpose of a Dynamic Positioning (DP) system on a vessel?

A.To moor the vessel to the seabed using anchors

B.To stabilise the vessel against roll using fin stabilisers

C.To provide propulsion only for transit between ports

D.To automatically maintain the vessel's position and heading using its own thrusters and propellers

Explanation: A DP system automatically maintains a vessel's position and heading exclusively by means of active thrust from its thrusters and propellers, without anchors or mooring lines.

5A DP control system continuously controls the vessel in which three degrees of freedom?

A.Surge, sway and yaw

B.Heave, roll and pitch

C.Surge, heave and roll

D.Sway, pitch and yaw

Explanation: DP actively controls the three horizontal-plane degrees of freedom: surge (fore/aft), sway (athwartships) and yaw (heading). Heave, roll and pitch are measured by the MRU but are not directly controlled by thrust.

6Which mathematical technique does the DP controller use to combine the mathematical vessel model with position-reference and sensor measurements to produce a best estimate of position?

A.Fast Fourier Transform

B.Kalman filtering

C.Linear regression

D.Proportional-only feedback

Explanation: The DP controller uses a Kalman filter to blend the predicted position from the mathematical model with noisy reference-system and sensor inputs, rejecting wild points and providing dead-reckoning if references are lost.

7Which sensor provides the DP system with the vessel's heading?

A.Motion Reference Unit (MRU)

B.Wind sensor

C.Gyrocompass

D.Vertical Reference Unit barometer

Explanation: The gyrocompass supplies heading (and rate of turn) to the DP system. A DP Class 2/3 vessel carries multiple gyros so heading data remains available after a single failure.

8What is the main function of the wind sensor input to a DP system?

A.To measure the vessel's position relative to a fixed structure

B.To determine the vessel's heading

C.To calculate the depth of water under the keel

D.To provide feed-forward compensation so thrust counters wind before the vessel is pushed off position

Explanation: Wind is the only major environmental force that can be measured directly, so the DP system uses it as a feed-forward term to apply corrective thrust before position error develops, improving station-keeping.

9Why does the DP system require a Motion Reference Unit (MRU) when using position-reference systems?

A.To correct reference-sensor positions for the vessel's roll, pitch and heave

B.To provide the vessel's heading to the controller

C.To measure wind speed at the masthead

D.To act as the main power-management computer

Explanation: The MRU measures roll, pitch and heave so the DP system can correct the geometry of antenna/transducer positions; without this correction, vessel motion would introduce false position errors.

10On a DP vessel, what is the purpose of an Uninterruptible Power Supply (UPS) serving the DP control system?

A.To provide main propulsion thrust during a blackout

B.To maintain power to DP computers, reference systems and sensors during a power interruption so control is not lost

C.To increase the vessel's generating capacity for heavy lifts

D.To charge the emergency towing battery

Explanation: UPS units supply continuous, clean power to the DP computers, reference systems and sensors so that a momentary loss or disturbance of main power does not cause loss of DP control. Class requirements specify minimum UPS endurance.

About the DPO Exam

The Nautical Institute DPO Certificate is an internationally recognised multi-phase professional-development route under the February 2026 New Offshore Scheme. Phase A is the DP Induction Course plus online examination; Phase B is verified DP sea time and task work; Phase C is the DP Simulator Course with online examination and practical assessment; Phase D is further qualifying DP sea time; and Phase E is the Master's Statement of Suitability before application to NI. It is not one universal theory test.

Exam sponsor: The Nautical Institute (NI), London. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Question count not published by the exam provider

Time Limit

Phase A online exam: 1 hour 15 minutes; other components follow the current NI standard and accredited-centre schedule

Passing Score

Phase A online exam: 70%; no single scheme-wide numeric passing score

Exam / Certification Fees

Varies by NI-accredited training centre; NI does not publish one universal course fee

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Not published

DP Principles & System Components

Editorial study cluster covering DP fundamentals, controlled motion, controllers, models, sensors, HMI, UPS, and operator responsibilities.

Not published

Position Reference Systems

Editorial study cluster covering absolute and relative references, DGNSS, hydroacoustics, taut wire, optical and microwave systems, independence, geometry, voting, and common-mode failure.

Not published

Power Generation & Thrusters

Editorial study cluster covering generation, PMS, reserve, distribution, bus configuration, thruster types, allocation, interaction, command/feedback, blackout, drive-off, and drift-off.

Not published

Equipment Classes & Assurance

Editorial study cluster covering IMO equipment Classes 1/2/3, redundancy, segregation, FMEA, trials, worst-case failure, consequence analysis, capability plots, and footprint plots.

Not published

Operational Planning & Watchkeeping

Editorial study cluster covering vessel- and activity-specific ASOG limits/actions, CAM, TAM, task planning, watchkeeping, communications, time to terminate, and escape routes.

Not published

Failures, Alarms & Response

Editorial study cluster covering alarm diagnosis, reference/sensor faults, power and thruster failures, position excursions, emergency priorities, logging, and vessel-specific recovery procedures.

Preparing for the DPO Exam

What You Need to Know

Passing score: Phase A online exam: 70%; no single scheme-wide numeric passing score
Assessment: Question count not published by the exam provider
Time limit: Phase A online exam: 1 hour 15 minutes; other components follow the current NI standard and accredited-centre schedule
Exam / certification fees: Varies by NI-accredited training centre; NI does not publish one universal course fee Official sources

Using Our Practice Resources

Work through all 113 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

DPO: Suggested Study Strategy

1Separate Phase A logistics from the multi-phase certificate: 40 MCQs, 75 minutes, and 70% apply to the Induction online exam.

2Treat all six page clusters as editorial study organisation because NI does not publish percentage weights for them.

3Learn the NI New Offshore sequence: Induction, sea time/tasks, Simulator plus online/practical assessment, further sea time, then suitability.

4For position references, test principle and failure-path independence rather than counting sensors alone.

5Use vessel- and activity-specific ASOG thresholds and actions; do not assume one universal colour/status convention.

6Distinguish design assurance (FMEA and trials) from live operational checks such as consequence analysis.

7Follow the vessel's approved emergency and operating procedures for control transfer, isolation, termination, and recovery.

Frequently Asked Questions

Who issues the DPO Certificate?

The Nautical Institute administers the training scheme, accredits training centres, and issues the final DPO Certificate after all required phases are verified. IMCA publishes industry guidance but does not issue the NI certificate.

What are the New Offshore Scheme phases?

Phase A is Induction plus online examination; Phase B is at least 60 DP sea-time days plus tasks and company confirmation; Phase C is Simulator training with online examination and practical assessment; Phase D is further qualifying sea time; Phase E is the Master's Statement of Suitability and certificate application.

What is the Phase A online examination?

The February 2026 NI standard specifies 40 multiple-choice questions, 1 hour 15 minutes, and a 70% pass mark.

Is there one official domain-weight blueprint?

No. NI publishes course objectives and phase requirements, but the reviewed standard does not assign universal percentage weights to the editorial study clusters on this page.

Does Phase C have only a practical assessment?

No. The current scheme requires the DP Simulator Course plus an NI online examination, and the course standard also includes an individual simulator practical assessment.

How much does the route cost?

Fees vary by NI-accredited training centre and route. NI does not publish a universal worldwide course-price range, so candidates should confirm charges with the selected centre.

How long is the certificate lifecycle?

The DPO Certificate is revalidated on a five-year cycle under the current NI rules; the available route depends on service, CPD, and course criteria.