The failure you can't see coming.
The part that sinks a boat is rarely the one you're looking at. It's the small service a manual specified and nobody re-read. Grej keeps every manual, service and interval for your boat — engine, tanks, seacocks, rigging, power — and tells you what needs doing before it becomes the expensive kind of surprise.
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The €50 job that saves the €50,000 one.
Most serious boat failures aren't bad luck. They're a scheduled part left in past its interval, or a symptom read the wrong way — a small, specified job that a manual named and no one went back to. The danger is that the failing part almost always looks fine right up until it doesn't. Grej closes that gap.
“It still looks new.”
A saildrive diaphragm or shaft-seal bellows is replaced on a clock — every 6–7 years — not when it looks worn. Owners who wait for a symptom often meet the first one as water coming into the boat.
Documented across Volvo Penta and PSS owner reports (Cruisers Forum, YBW).
Grej counts the interval from the day the part went in — and reminds you before the clock runs out.
It's the neighbour, not the part.
The stuffing box gets all the attention; the short rubber shaft-log hose hidden beneath it quietly hardens with age. One routine adjustment afloat rotated the aged hose — and the boat began taking on water fast.
From a near-sinking reported by the owner (EricsonYachts.org, Sailboat Owners).
Grej knows which hidden neighbours share a part's failure envelope, and surfaces them the moment you touch it.
“The handle turned, so it's open.”
A seacock handle swings through its full travel and feels completely normal — but the ball inside never opened. The engine lost its cooling water minutes after leaving the dock.
Reported by owners on YBW Forum and Freedom Yachts.
When something feels off, Grej reads the symptom — “check the valve, not the handle” — before you chase the wrong, costly fix.
This is what Grej is for. Not a folder for your boat papers — the difference between a manual that sits unread and one that tells you, at the right moment, the small thing that prevents the big one. Every job it keeps also becomes documented history that raises the boat's value when you sell.
Expert knowledge, instantly.
What does this fault code on the radar mean?
That's an E-03 error for your Raymarine Axiom. It usually indicates a high temperature warning for the processing unit. Check the ventilation in your console rack behind the nav station.
How often should the autopilot be serviced?
Based on your installation manual, the hydraulic actuator seals should be inspected every 500 hours or annually. Your last service recorded was 14 months ago; I recommend a pressure test before your next crossing.
When was the water-maker's membrane last replaced?
You uploaded an invoice from Palma Marine Services dated March 12, 2023. Both membranes were replaced and pickled during that winter haul-out.
The maintenance list that builds itself
Every boat carries a running list of small things — the winch that sticks, the halyard starting to chafe, the seacock that weeps. Add them the moment you notice, in a few taps; troubleshoot a problem with the assistant and it captures the details too. Over a season it builds into one well-documented checklist — your photos, your notes — that you'll be able to hand straight to your service yard, so the right jobs get done and nothing slips between you and the mechanic.
“Genoa car binds on the port track” — logged in March, photo attached, waiting for haul-out. Your yard sees exactly what, where, and since when.
Already this smooth
Share the autopilot's installation manual, the AIS wiring diagram, or a photo of the yard invoice — straight into Grej.
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