BoatOn Book vs Excel: Why Vessel Maintenance Teams Are Ditching Spreadsheets
Most vessel maintenance teams started with Excel. It’s free, everyone knows it, and it works — up to a point. The problem is that “up to a point” arrives fast in the maritime world: a missed update, a file no one can find, and suddenly your next PSC inspection is at risk.
In 2026, more and more teams are switching to a dedicated maritime CMMS. Here’s what’s driving that move — and what they’ve actually gained.
What Excel simply cannot do for you
Excel is a calculation tool. Not a maintenance tool. That distinction matters.
A spreadsheet stores data. It doesn’t know your main engine is due for inspection in 48 hours. It doesn’t alert you when a hydraulic filter is reaching end of life. It doesn’t automatically generate your report for the Paris MOU inspector.
The result: the information exists in the file, but someone has to remember to go look for it. On a vessel, “someone” too often ends up being “no one”.
The 5 critical limitations of Excel for vessel maintenance
1. Zero timestamped audit trail
Who modified row 47 of “engine_maintenance_V3_FINAL.xlsx” and when? Impossible to know without an audit log. In the event of a dispute or inspection, you have no proof of who did what and when. A maritime CMMS records every action with the user ID and exact timestamp.
2. Version chaos kills reliability
“maintenance_2026_V2_FINAL_REAL.xlsx” — sound familiar? Version proliferation is the number one complaint from technical teams leaving Excel. On a vessel with multiple engineers, the risk of working on an outdated version is constant. A CMMS centralises a single source of truth, accessible from any terminal on board or ashore.
3. No automatic alerts
Excel reminds you of nothing. You have to go looking for deadlines. No chief engineer on an active vessel opens their spreadsheet every morning to check upcoming maintenance dates. A CMMS sends automatic alerts before every due date — by email, notification, or directly on the onboard interface.
4. Unusable offline on mobile
Shared Excel files via SharePoint or Google Sheets require a stable internet connection. At sea, that’s rarely guaranteed. BoatOn Book works in offline mode and syncs automatically once connectivity is restored.
5. No built-in compliance documentation
Excel doesn’t know the ISM Code. It doesn’t generate your digital logbook, doesn’t structure your reports to MLC or MARPOL requirements, and doesn’t automatically prepare the file for your PSC inspection. Every document has to be produced manually — and the risk of error or omission is high.
What teams gain by switching to BoatOn Book
Teams that make the switch report three main gains.
Fewer oversights, fewer breakdowns. When maintenance alerts arrive automatically, preventive operations are carried out on time. Companies deploying a maritime CMMS reduce their maintenance costs by an average of 20 to 25% within 18 months (MarketsandMarkets, 2026).
Traceability that protects you. Every intervention is timestamped, signed, and archived. In the event of an inspection or dispute, you have a complete, irrefutable history. That’s what PSC inspectors expect — and what Excel cannot reliably provide.
Simplified access, even offline. Deck and engine crews access their maintenance schedule from a phone or tablet, at sea or in port. No more asking someone ashore to send the latest version.
BoatOn Book vs Excel: functional comparison
The 7 key features where BoatOn Book outperforms Excel:
Automatic maintenance alerts — BoatOn Book ✓ / Excel ✗
Timestamped, traceable history — BoatOn Book ✓ / Excel ✗
Single source of truth, no versioning — BoatOn Book ✓ / Excel ✗
Offline mobile mode — BoatOn Book ✓ / Excel ✗
Built-in PSC / ISM compliance reports — BoatOn Book ✓ / Excel ✗
Digital logbook — BoatOn Book ✓ / Excel ✗
Automated carbon footprint reporting (ADEME partnership) — BoatOn Book ✓ / Excel ✗
Where to start?
If you’re still using Excel to manage maintenance on your vessel or fleet, moving to a maritime CMMS isn’t a disruption — it’s a migration. BoatOn Book imports your existing data and your team is up and running in under a week.
The real question isn’t “should I switch tools?” — it’s “how much longer can I afford the risk that a missed spreadsheet update costs me a PSC detention or a breakdown at sea?”
Book a BoatOn Book demo — the team will show you how to migrate your Excel data in under 30 minutes.
