DECK & NAVIGATION
Available now
Your course to the bridge.
Learning resources, practical guidance and career support for deck cadets and future navigation officers.
Navigation · Revision · Cadet support
Explore DCOne THE PARENT BRAND FOR DCONE, ECONE & KITONE
One umbrella.
Your maritime future.
SEAOne brings DCOne, ECOne and the proposed KITOne together under one umbrella. Explore deck and navigation with DCOne, with marine engineering through ECOne and KITOne currently at proposal stage.
Find your pathwayFrom your first sea phase to your next horizon.
4.1kResource downloads
3.4kDCOne visitors
7.2kPage views
63%COLREGS
24%Safety & communications
13%Buoyage
11+Visitor countries
DCOne snapshots · 7 Oct 2026 · Visitors & views since 23 Aug 2025 · Country period unspecifiedTHE PLATFORMS UNDER SEAONE
One family. Growing together.
SEAOne is the umbrella.
DCOne and ECOne are your department platforms.
KITOne is a proposed addition to the family.
MARINE ENGINEERING
Coming soon
Your future in engineering.
A planned learning platform with resources, practical guidance and cadet support focused on marine engineering.
Engineering · Learning · Cadet support
Meet ECOne SEAFARER MERCHANDISE
Concept / proposal
Your kit for the journey.
A proposed merchandise range with clothing, stationery and practical accessories designed for cadets and seafarers.
Clothing · Stationery · Accessories
Explore KITOne SHARED SUPPORT UNDER SEAONE
Cadet life belongs to every department.
Whether you’re training for the bridge, engine room or an ETO role, SEAOne is your home for the everyday side of cadetship.
UNDERSTANDING THE SEAONE FAMILY
What is SEAOne?
SEAOne is the parent brand and umbrella for the SEAOne family. DCOne supports deck and navigation, while ECOne is preparing to support marine engineering. KITOne is a proposed addition focused on merchandise for cadets and seafarers, such as jumpers and notebooks tailored to the maritime community. Together, they share SEAOne’s purpose and community.
Watch: how SEAOne works · 12 seconds · Social reel
Captioned animation · No audio. SEAOne brings DCOne, the upcoming ECOne and the proposed KITOne together, with shared cadet guides, a PDF library and partner support. Membership features are still being prepared.
Parent & umbrella brandDeck & NavigationExplore DCOne →Marine EngineeringComing soon · Not yet availableCadet & seafarer merchandiseConcept / proposal stageSEAOne brings us together.
Think of SEAOne as the home of the wider community. It gives DCOne and the upcoming ECOne a shared identity and a place for cadets to find their department’s resources.
DCOne focuses on your deck cadetship.
Deck Cadet One is the deck and navigation platform within SEAOne. Its resources cover navigation, COLREGS, maritime law, emergency operations, revision and practical cadet life.
Explore DCOneDCOne continues as your dedicated deck resource hub. ECOne will join the family with marine engineering support when it launches.
BUILT BY CADETS, FOR CADETS
Different departments.
Shared ambition.
SEAOne brings our maritime learning community together. DCOne continues to focus on deck cadets, with ECOne preparing to support the next generation of engineering cadets.
Practical experience, accessible learning and the support to keep moving forward.
Our storyKNOWLEDGE · COMMUNITY · EXPERIENCE · SUPPORT
Our partners
We want partnerships to make a practical difference to cadets: relevant learning, accessible tools and support for your next step at sea. Our focus is on organisations that address real training needs, offer clear value and help you make informed choices.
NEW IN THE COMMUNITY
Latest updates
NEW RESOURCES ·
Pack for your next phase.
Our new SEAOne college and sea packing checklists are ready to download, with support for cadets across all departments.
Get the packing lists →
CADET GUIDANCE ·
Your cadetship, step by step.
Click through sponsorship, college choices and the training phases, then explore the different qualification routes.
Explore the guide →PARTNER NEWS ·
Meet The Maritime Master.
Discover our new partner’s maritime learning apps and visual resources. A partner discount is being arranged.
Meet our new partner →HELP SHAPE SEAONE
Join the team.
Make a difference for cadets.
We’re looking for more people to help grow SEAOne and support the next generation of maritime cadets.
Whether you’re a cadet, a seafarer or someone with useful skills to share, we’d love to hear from you. Help create learning resources, share practical experience, contribute ideas or build our community across deck and engineering.
You don’t need to have everything figured out—tell us what interests you and how you’d like to get involved.
Contact us about joiningREADY TO GET STARTED?