Stop Juggling Spreadsheets.
Start Managing Your Boat.
Everything you need to organize boat ownership in one place. Projects, maintenance, checklists, inventory, and crew collaboration - all designed specifically for sailors.
100% Free • No credit card • No subscriptions • Example boat included
Sound Familiar?
Scattered spreadsheets. Forgotten maintenance dates. Mystery spare parts in unlabeled lockers. Project lists on napkins. Co-owners asking "where's the..." for the tenth time.
There's a better way.
Everything You Need in One Place
Purpose-built tools to keep your boat organized, maintained, and ready to sail.
Project Management
Kanban boards for tracking upgrades and repairs. Assign tasks, set budgets, add checklists, and watch your projects move to 'Done.'
Smart Checklists
Pre-departure, post-arrival, commissioning, winterization. Auto-reset based on your sailing activity. Never forget the seacocks again.
Maintenance Tracking
Schedule by engine hours or calendar dates. Get reminders. Auto-create tasks on your project board when maintenance is due.
Inventory System
Know what you have and where it's stored. Hierarchical locations, quantities, tags. No more buying duplicate spare parts.
Visual Floorplan
Map your boat's layout with zones, storage locations, wiring, and plumbing. Interactive canvas with resize and export.
Crew Collaboration
Share with co-owners, family, or crew. Role-based permissions. Everyone stays in sync on projects and inventory.
Introducing Sentinel Core
Your Boat's Brain - Monitor Anywhere, Anytime
The first cloud-connected marine monitoring system that bridges analog sensors and NMEA 2000 networks. Choose the connectivity option that matches your cruising style.
Sentinel Core
WiFi Connectivity
- Built-in WiFi access point
- Local web configuration
- NMEA 2000 output
- 4 analog + 4 digital inputs
Perfect for marina and coastal cruising with WiFi access
Sentinel Coastal
LTE Connectivity
- Everything in Core, plus:
- LTE Cat-M1 cellular
- Cloud monitoring & alerts
- GPS tracking & geofencing
Ideal for coastal cruising with cellular coverage
Sentinel Offshore
Iridium Satellite
- Everything in Coastal, plus:
- Iridium Short Burst Data
- Global satellite coverage
- Critical alerts anywhere
For bluewater cruisers and offshore passages
See It in Action
Visual Project Management
Track upgrades and repairs with Kanban boards. Assign tasks, add costs, set priorities.
Automated Maintenance Tracking
Schedule tasks by engine hours or calendar dates. Never miss critical maintenance again.
Visual Floorplan Editor
Map your boat's layout, electrical systems, plumbing, and component locations.
Complete System Documentation
Organize locations, zones, wiring, and components in one visual reference.
Get Started in Minutes
Create Account
Create your account. An example boat with sample data is waiting for you.
Explore Features
Poke around the example boat to see how everything works.
Add Your Boat
Create your real boat and start organizing your ownership journey.