The EOOW & ETO Bible

Pass your EOOW & ETO orals with confidence — 12 modules, 1,200+ flashcards, exam simulator and AI oral examiner. Works fully offline at sea. Fleet & college seats too.

The complete study companion for marine engineers preparing for the MCA Engineer Officer of the Watch (EOOW) and Electro-Technical Officer (ETO) Certificates of Competence.

Built around the STCW A-III/1 and A-III/6 syllabus and MCA MIN 654, The EOOW & ETO Bible turns months of scattered notes, textbooks and past papers into one focused, structured course that fits in your pocket — onboard, ashore or at the academy.

WHO IT'S FOR • Cadets and trainee engineers working toward EOOW • Electro-Technical Officers preparing for the ETO CoC • Qualified engineers refreshing before orals or revalidation

CHOOSE YOUR PATH Pick EOOW or ETO when you sign up and your syllabus adapts to you. The core modules for your certificate sit front and centre, with every other engineering topic available as additional study whenever you want it. Switch roles any time.

12 COMPLETE MODULES Marine Diesel Engines · Marine Boilers & Steam · Auxiliary Machinery · Marine Electrical Systems · Automation & Control · Refrigeration & Air Conditioning · Naval Architecture & Stability · Safety & Firefighting · Environmental Compliance (MARPOL) · Watchkeeping & ER Management · High Voltage Systems · Electronics, PLCs & Navigation Systems

PART B ORAL SIMULATOR Rehearse the oral exam with an AI examiner that asks realistic scenario questions, listens to your spoken answers and gives instant, constructive feedback — so you walk into the real thing calm and prepared.

FLASHCARDS THAT KNOW WHAT YOU FORGET A proven spaced-repetition engine schedules every card at just the right moment, so your revision time goes to what you're about to forget — not what you already know.

MOCK EXAMS & QUICK REVISION • Timed mock exams that mirror the real Part A format • Hundreds of practice questions across all five question types • Per-topic accuracy tracking that surfaces your weak areas • Quick Reference cards for pump troubleshooting, MARPOL limits, fuel treatment and more

TRACK YOUR PROGRESS Watch your knowledge grow with clear dashboards, streaks and engineering ranks — from Motorman all the way to Chief Engineer.

STUDY ANYWHERE Core content works offline, so a weak signal at sea is never an excuse to stop revising.

START FREE The Marine Electrical Systems module is completely free. Unlock all 12 modules, the full oral simulator and unlimited mock exams with Premium.

SUBSCRIPTION EOOW & ETO Bible Premium is available as a monthly or annual auto-renewing subscription. • Payment is charged to your Apple ID at confirmation of purchase • The subscription renews automatically unless cancelled at least 24 hours before the end of the current period • Manage or cancel any time in your App Store account settings

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The EOOW & ETO Bible is an independent study aid. It is not affiliated with, endorsed by or sponsored by the Maritime and Coastguard Agency (MCA) or any certifying body. Always study alongside official MCA publications and the current regulations.