Why the department split matters
Nobody explains this before you start applying. You will see a job ad for "2nd stew" or a course listed under "engineering" long before anyone sits you down and explains what the four departments actually cover. Picking a lane early shapes which certificates you chase first, which agency desk you register with, and which questions you can credibly answer in an interview. Our interview questions guide covers the conversation itself; this one is about knowing what you would actually be saying yes to.
The structure below holds on almost every commercially crewed yacht, from a 24 metre charter boat to a 100 metre plus superyacht. What changes with size is not the four functions, it is how many people share the work and how specialised each role gets.
Deck department
Deck runs the yacht itself: navigation, safety equipment, exterior maintenance, and usually the tenders and guest water toys too. It is the department under the Captain's direct command, and on most yachts it is the largest single team after interior.
Ultimate authority and responsibility for the vessel, the crew and the guests. Every department head on board reports up to this role.
Deputises for the Captain and runs day-to-day deck operations: the watch rota, safety systems, and crew training on larger yachts.
Stands navigation watches and runs safety drills. On many yachts also drives tenders and manages guest water sports.
Senior deckhand and team leader. Owns the maintenance schedule and manages the rest of the deck team's daily workload.
Supports watchkeeping, exterior maintenance, and tender or watersports operation. See our career path guide for the certificates behind each step.
Entry-level deck crew: washdowns, varnishing, fendering, lines, and general exterior upkeep. The most common true green-crew starting point on deck.
Interior department
Interior owns everything the guest experiences inside the yacht: housekeeping, service, laundry, provisioning and the overall guest experience. On yachts over roughly 50 metres a Purser often joins the team to handle admin and accounts, which is why interior can be the largest department on bigger boats.
Department head. Sets the service standard, manages the interior budget and provisioning, and is the main guest liaison.
Handles administration, accounts and guest paperwork. Only found on bigger yachts where the workload justifies a dedicated role.
Supervises housekeeping and service standards day to day, and deputises for the Chief Stew.
Entry-level interior crew: service, housekeeping and laundry. Alongside deck, the other common true green-crew starting point.
Whichever department you land in, the paperwork looks the same. STCW and ENG1 are non-negotiable everywhere on board. YachtSync scans, stores and reminds you before anything expires, and lets you share your full certificate portfolio with a captain or agency in one tap. Free for crew. Always.
Engineering department
Engineering keeps the yacht itself running: propulsion, generators, watermakers, HVAC, plumbing and electrical systems. Most engineers arrive in yachting via a shore-based trade (marine engineering, electrical, HVAC) rather than starting as true green crew, which makes engineering slightly less of a walk-in department than deck or interior.
Department head. Oversees every mechanical, electrical and technical system on board, plus the safety-critical machinery.
Hands-on maintenance of engines, generators, watermakers and HVAC. Deputises for the Chief Engineer.
Entry-level workshop tasks and watchkeeping support. Typically arrives with some relevant trade background rather than none at all.
A specialist role alongside the engineering ladder rather than a rung on it, responsible for electrical, IT, audio-visual and navigation systems. Carried mainly on larger yachts, with some of the biggest running both a senior and a junior ETO.
Galley department
Galley covers all food on board, for guests and for crew: menu planning, provisioning, food safety and the galley budget. On smaller yachts one sole chef often runs the whole department alone; on larger ones a Head Chef leads a small brigade.
Department head, or the only chef on board on a smaller yacht. Menu planning, provisioning, and all guest and crew food.
Support role that only appears once a yacht is large enough to run a full galley team, often splitting guest and crew catering.
The Food Safety and MCA Ship's Cook Certificate requirements behind each galley role are covered in full in the galley career pathway, and indicative pay by rank is in our yacht crew salary guide.
How the four departments fit together
Every department head reports directly to the Captain, so there is one chain of command rather than four separate ones. Day to day, the departments still work across each other constantly: deck and interior coordinate guest arrivals and watersports, galley and interior coordinate meal service and timing, and engineering supports all three by keeping the systems everyone else relies on running.
| Department | Head of department | Typical green-crew entry role |
|---|---|---|
| Deck | Captain (department head is the Captain directly) | Deckhand / OS |
| Interior | Chief Steward / Stewardess | 3rd / Junior Steward(ess) |
| Engineering | Chief Engineer | Junior Engineer, usually via a shore trade |
| Galley | Head Chef | Crew chef, usually via prior culinary training |
Crew size scales, the structure does not
The four functions exist on almost every crewed yacht. What changes with length is how many people share the work, and how specialised each role becomes. According to yacht crew recruitment agency YPI Crew, total crew numbers scale roughly like this:
| Yacht length | Typical total crew |
|---|---|
| 24 to 30m (80 to 100ft) | 2 to 8 |
| 30 to 60m (100 to 200ft) | 8 to 20 |
| 60m+ (200ft+) | 20 or more |
| 100m+ (328ft+) | 30 to 50 or more |
At the small end, one deckhand might also lend a hand in the engine room, and a sole chef covers the whole galley alone. Specialist roles like a Purser or an ETO, described by recruitment specialists Lighthouse Careers as working closely with the Chief Engineer on the yacht's electrical, IT and navigation systems, tend to appear only once a yacht is large enough to justify a fully staffed department. This structure, four departments each led by a department head reporting to the Captain, is described consistently across the industry, including by yacht brokerage Ocean Independence.
Know your department. Track your certificates.
Whichever department you join, YachtSync keeps your STCW, ENG1 and every other certificate current and ready to share, so you can focus on learning the role, not chasing paperwork.
Free for crew: 20 certificates, 3 AI scans, renewal reminders. No card required. iOS only.
Frequently asked questions
What are the four departments on a superyacht?
Deck, interior, engineering and galley. Deck handles navigation, safety and exterior maintenance. Interior handles housekeeping, service and the guest experience. Engineering keeps every mechanical, electrical and technical system running. Galley covers guest and crew food. Each department has its own head, and all four report directly to the Captain.
Which department is easiest to join as green crew with no experience?
Deck and interior are the most common true zero-experience entry points, since the day-one role (deckhand or junior steward) is taught on the job once you have STCW and an ENG1. Engineering and galley can also take green crew, but captains generally look for some prior trade background for engineering or culinary experience for galley before signing someone on.
What does an ETO do, and is it part of engineering?
An ETO (Electro-Technical Officer) is a specialist within the engineering department, reporting to the Chief Engineer, responsible for the yacht's electrical, IT, audio-visual, communications and navigation systems. ETOs are mainly carried on larger yachts, and the largest superyachts sometimes run both a senior and a junior ETO.
Do all yachts have all four departments?
The same four functions exist on almost every crewed yacht, but on smaller boats one person often covers more than one of them, such as a deckhand who also helps the engineer, or a sole chef running the whole galley alone. Dedicated, fully staffed departments with specialist roles like a Purser or an ETO tend to appear only once a yacht is large enough to justify them.
Related guides: Yacht crew career path → · Yacht crew salary guide → · Types of yacht crew jobs explained → · How to get a superyacht job with no experience → · Full career pathways →