Keeping your boat shipshape!

AftLog Tools

Every free boating tool in one place — planning, tracking, maintenance, diagnostics, and reference.

20 tools, all free and all work offline in your browser. For the full boat-manager experience — logbook, intervals, checklists, documents and more — use the AftLog app on your phone.

Safety & planning

Emergency — What to Do If…

Calm steps + your GPS position ready to share with help.

Float Plan

Tell someone where you're going and when you'll be back.

Compliance

Registration, safety gear, and the boating rules.

Ramp Mode

Big-button launch and retrieve checklist for the ramp.

Trip & fuel

Trip & Fuel Log

Log trips and fills; see your real fuel range and time-to-empty.

Trip Patterns

Totals, averages, seasonality, and outliers from your trips.

Predictive Planner

What's due next by hours, months, and severity.

Checklists & seasonal

Checklists

Launch, retrieve, towing and seasonal checklists with saved progress.

Winterization Planner

Freeze-up and ice-out timing for your region.

Buying & cost

Buying Advisor

Rule-based used-boat evaluation with risk warnings.

Cost of Ownership

Total spent, per-hour cost, services, fuel, and fuel burn.

Maintenance & parts

DIY Library

Step-by-step repairs you can do yourself.

Manual Finder

Official manuals and parts sources, grouped.

Parts Locator

Pick a part and jump to suppliers who carry it.

Battery & Electronics

Track your gear and size wiring.

Diagnostics & AI

AI Diagnostics

Symptom + drive selector with causes and next steps.

Visual Engine Assist

Tap a part on the diagram and get the check for it.

Ask AftLog

Boat-specific AI answers, grounded and offline.

Reference & math

Calculators

Fuel burn, prop slip, anchor, voltage drop, oil mix.

Glossary

Boat terms in plain talk — and the technical version.