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DECK CADET ONE · PART OF SEAONE
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Free learning resources and practical support for Merchant Navy deck cadets — from college and sea phases to your first Certificate of Competency.
Deck & Navigation / Built by cadets, for cadets
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DCOne snapshots · 7 Oct 2026 · Visitors & views since 23 Aug 2025 · Country period unspecifiedLearn and Prepare
Clear maritime topics and revision material to help you make the most of your study time.
Navigate Your Career
Understand your cadetship and the steps towards your first CoC and a future on the bridge.
YOUR RESOURCE HUB
Knowledge for the journey ahead.
01
Navigation
Chartwork, buoyage and the foundations of safe navigation.
Explore navigation02COLREGS
Build your understanding of collision avoidance and sound signals.
Explore colregs03Emergency operations
Explore man overboard operations, distress and urgency.
Explore emergency operations04Maritime law & business
Get to grips with the legal and commercial side of shipping.
Explore maritime law & business05Revision papers
Make space for focused practice ahead of your exams.
Explore revision papers06SEAOne cadet life
Shared cadetship guidance and packing lists for every department.
Explore cadet lifePART OF SOMETHING BIGGER
DCOne expertise.
SEAOne community.
Your home for deck and navigation stays DCOne. Through SEAOne, we’re building a connected community for maritime trainees, with ECOne marine engineering support coming next.
Explore the SEAOne familyYOUR FIRST STEP