5 Things Every Sailor Should Track (But Probably Doesn't)
Engine hours, impeller intervals, haul-out history — most boat owners are guessing. Here's the paper trail that protects your investment and your safety.
Ask most boat owners when they last changed their raw water impeller and you'll get one of two answers: a confident date (probably wrong) or an honest shrug. The marine industry has a well-worn joke — there are two types of sailors: those who have lost an engine and those who will.
Most engine failures on auxiliary sailboats are preventable. Impeller failure, overheating from scale buildup, belt slip — these don't happen suddenly. They happen because nobody was keeping score.
Here are the five things we think every boat owner should be actively tracking — and what to actually do with that information.
1. Engine hours (not calendar dates)
Most engine service intervals are specified in hours, not months — but most owners track time instead. "Changed the oil last spring" doesn't tell you if that was 20 hours ago or 200. Oil breaks down from heat cycles and combustion byproducts, not from the passage of time sitting in the sump.
What to track: Engine hours at every service. Your raw water impeller interval is typically every 200-300 hours (check your manual). Oil and filter: every 100-150 hours or annually, whichever comes first. Transmission fluid: every 200 hours.
2. Haul-out & underwater inspection history
When did you last have a rigger inspect your keel bolts? When were your cutless bearings last measured? What was the bottom paint that was applied two seasons ago — because that matters for compatibility with your next choice.
Haul-out records are your vessel's credit history. When you go to sell, a detailed haul log with dates, observations, and costs is worth real money. Buyers (and surveyors) notice when you can produce it.
3. Safety gear expiry dates
Visual distress signals (flares) have a 42-month service life from the date of manufacture — not purchase. EPIRB batteries and hydrostatic releases have expiry dates. Life raft service intervals are typically 1-3 years.
A Coast Guard safety check doesn't catch everything — and a boarding for expired flares offshore is an expensive, embarrassing lesson. Set a reminder. Log the dates.
4. Standing rigging inspection notes
Most recreational sailors get their rig inspected every two years. Fewer write down what the rigger found. "Standing rigging checked" in a logbook is not the same as "starboard upper shroud swage showing first signs of corrosion at tang — monitor, replace next season."
The difference between those two entries might be a dismasting.
5. True cost of ownership
The "10% of purchase price per year" rule is a rough average, not a law of physics. Some boats, in some regions, cost 5%. Others cost 20%. The only way to know your number — and to make smart decisions about upgrades versus selling — is to track every dollar.
This isn't just about budgeting. When you can show a prospective buyer a clean 5-year maintenance ledger with receipts, you're not just selling a boat — you're selling peace of mind. That commands a premium.
VesselOS was built to make tracking all five of these easy — maintenance logs with engine hours, haul-out records, safety gear reminders, and budget tracking all in one place, offline-first, on any device. Try it free.