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Bank of over 11,700 questions for the six STCW certificates of competency — deck and engine, from Officer in Charge of a Watch to Master and Chief Engineer — plus the Marlins English Test. The same competence tables, whatever flag you sail under.
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Certificates & full syllabus
Select your certificate of competency to see the syllabus it covers.
Officer in Charge of an Engineering Watch
- 01Pollution Prevention22 qs.
- 02Stability and Buoyancy82 qs.
- 03Ship Construction45 qs.
- 04ISM Code135 qs.
- 05Tools and Equipment172 qs.
- 06Auxiliary Machinery483 qs.
- 07Pumping Systems170 qs.
- 08Pumping Operations21 qs.
- 09Electrical Installations32 qs.
- 10Machinery Maintenance134 qs.
- 11Medical First Aid65 qs.
- 12Personal Survival Techniques61 qs.
- 13Survival Craft and Rescue Boats148 qs.
- 14Fire Prevention and Firefighting86 qs.
- 15Personal Safety and Social Responsibilities117 qs.
- 16Personal Safety on Board41 qs.
- 17ISPS Code20 qs.
Officer in Charge of a Navigational Watch
- 01Pollution Prevention22 qs.
- 02Stability and Buoyancy82 qs.
- 03Ship Construction45 qs.
- 04ISM Code135 qs.
- 05Celestial Navigation92 qs.
- 06Compasses and Steering Systems78 qs.
- 07Meteorology152 qs.
- 08COLREG and Buoyage168 qs.
- 09Emergency Response70 qs.
- 10Visual Signaling72 qs.
- 11Ship Maneuvering and Handling42 qs.
- 12Cargo Stowage and Hatches66 qs.
- 13Medical First Aid65 qs.
- 14Personal Survival Techniques61 qs.
- 15Survival Craft and Rescue Boats148 qs.
- 16Fire Prevention and Firefighting86 qs.
- 17Personal Safety and Social Responsibilities117 qs.
- 18Personal Safety on Board41 qs.
- 19ISPS Code20 qs.
Second Engineer Officer
- 01Trim, Stability and Stress Control22 qs.
- 02Risk Assessment at Sea11 qs.
- 03Pollution Prevention22 qs.
- 04ISM Code135 qs.
- 05Operations Planning82 qs.
- 06Starting and Stopping Machinery and Systems50 qs.
- 07Main Engine Operation and Assessment51 qs.
- 08Fuel and Ballast Operations60 qs.
- 09Electrical and Electronic Equipment Maintenance40 qs.
- 10Fault Diagnosis and Correction19 qs.
- 11Main Engine and Control Systems359 qs.
- 12Alternators and Generators170 qs.
- 13Marine Engineering Control Systems269 qs.
- 14Medical First Aid65 qs.
- 15Personal Survival Techniques61 qs.
- 16Survival Craft and Rescue Boats148 qs.
- 17Advanced Firefighting64 qs.
- 18Personal Safety and Social Responsibilities117 qs.
- 19Personal Safety on Board41 qs.
- 20ISPS Code20 qs.
Chief Engineer Officer
- 01Trim, Stability and Stress Control22 qs.
- 02Risk Assessment at Sea11 qs.
- 03Pollution Prevention22 qs.
- 04Regulatory Compliance Supervision32 qs.
- 05ISM Code135 qs.
- 06Operations Planning82 qs.
- 07Starting and Stopping Machinery and Systems50 qs.
- 08Main Engine Operation and Assessment51 qs.
- 09Fuel and Ballast Operations60 qs.
- 10Electrical and Electronic Equipment Operation51 qs.
- 11Electrical and Electronic Equipment Maintenance40 qs.
- 12Safe Maintenance Procedures49 qs.
- 13Fault Diagnosis and Correction19 qs.
- 14Main Engine and Control Systems359 qs.
- 15Alternators and Generators170 qs.
- 16Medical First Aid65 qs.
- 17Personal Survival Techniques61 qs.
- 18Survival Craft and Rescue Boats148 qs.
- 19Advanced Firefighting64 qs.
- 20Personal Safety and Social Responsibilities117 qs.
- 21Personal Safety on Board41 qs.
- 22ISPS Code20 qs.
Chief Mate
- 01Trim, Stability and Stress Control22 qs.
- 02Marine Risk Assessment11 qs.
- 03Pollution Prevention22 qs.
- 04Stability and Buoyancy82 qs.
- 05Ship Construction45 qs.
- 06Monitor Regulatory Compliance32 qs.
- 07ISM Code135 qs.
- 08Manoeuvre and Handle Ship56 qs.
- 09Terrestrial and Coastal Navigation170 qs.
- 10Compasses and Steering Systems78 qs.
- 11Meteorology152 qs.
- 12COLREG and Buoyage168 qs.
- 13Emergency Response70 qs.
- 14Visual Signalling72 qs.
- 15Cargo Work40 qs.
- 16Cargo Stowage and Hatches66 qs.
- 17Medical First Aid65 qs.
- 18Personal Survival Techniques61 qs.
- 19Survival Craft and Rescue Boats148 qs.
- 20Advanced Firefighting64 qs.
- 21Personal Safety and Social Responsibilities117 qs.
- 22Personal Safety on Board41 qs.
- 23ISPS Code20 qs.
Master
- 01Trim, Stability and Stress Control22 qs.
- 02Marine Risk Assessment11 qs.
- 03Pollution Prevention22 qs.
- 04Ship Construction45 qs.
- 05Monitor Regulatory Compliance32 qs.
- 06ISM Code135 qs.
- 07Manoeuvre and Handle Ship56 qs.
- 08Shipmaster's Business104 qs.
- 09Manoeuvring and Emergency Procedures87 qs.
- 10Navigation170 qs.
- 11Compasses and Steering Systems78 qs.
- 12Meteorology152 qs.
- 13COLREG and Buoyage168 qs.
- 14Visual Signalling72 qs.
- 15Cargo Work40 qs.
- 16Medical First Aid65 qs.
- 17Personal Survival Techniques61 qs.
- 18Survival Craft and Rescue Boats148 qs.
- 19Advanced Firefighting64 qs.
- 20Personal Safety and Social Responsibilities117 qs.
- 21Personal Safety on Board41 qs.
- 22ISPS Code20 qs.
Marlins English Test
- 01Listening — audio comprehension & sounds330 qs.
- 02Grammar298 qs.
- 03Vocabulary — maritime terms313 qs.
- 04Time & Numbers — incl. audio dictation149 qs.
- 05Reading comprehension166 qs.
- 06SMCP & radio phrases (extra practice)95 qs.
- 07Maritime writing & documentation (extra practice)49 qs.
Marlins is a trademark of its owner. Nauti Test Pro is an independent practice tool, not affiliated with or endorsed by Marlins or the ICS.
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Content follows the STCW Convention as amended, competence table by competence table.
Wherever you sail
One syllabus worldwide — study from the ship, the academy or home, in English.
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Frequently asked questions
For seafarers preparing an STCW certificate of competency — deck or engine, from Officer in Charge of a Navigational or Engineering Watch up to Chief Mate, Master, Second Engineer Officer and Chief Engineer Officer — and for anyone sitting the Marlins English Test. The STCW competence tables are the same worldwide, so the bank works whichever administration issues your certificate.
Over 11,700 questions across 130 chapters covering the full competence tables — COLREG, navigation, cargo work, stability, ISM, ISPS, survival, firefighting, machinery, electrical and control systems — plus 1,400 Marlins English questions, 400 of them with audio.
Yes. Content follows the STCW Convention as amended (Manila), organised by the competence tables of Regulations II/1, II/2, III/1 and III/2.
Questions, audio recordings and the interface are in English, under the official English STCW titles. The Marlins bank is English by definition; the written explanation shown after each Marlins answer is currently in Spanish.
The app installs on iOS and Android and launches from your home screen just like a native app. An internet connection is required to use tokens and save your progress.
Creating an account is completely free, and you can earn 5 practice tokens by verifying your email and your phone number. If you need more, plans start from US$8.99 — one token is one test or one mock exam.
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5.08 reviews27/08/2026, 08:23 a.m.