Master's Mate is the cruising app that runs your whole boat from your phone. Charts, anchor watch, weather routing, AIS, your boat's systems and the cruising community, all in one place.

It's built by a family who lives aboard in the Caribbean, for people who live on the water.

SLEEP THROUGH THE SQUALL
Set your anchor and Master's Mate watches it all night. If the boat drags, a loud alarm wakes you, even with your phone locked. Everyone aboard gets it, and one tap silences it for all of them.

EVERY SYSTEM ABOARD, ON YOUR PHONE
Connect your boat once and see it live from anywhere: position, depth, wind, speed, batteries, solar, tanks and engine. It works with NMEA 2000, NMEA 0183 and Victron, through the Bosun Box or the gear you already have.

CHARTS AND AIS
A full chart plotter with live AIS traffic. See every boat around you, with a history of the ones you've met before. Get alerts when a ship is on a collision course.

WEATHER ROUTING
Plan a passage against forecast wind using your boat's own performance. Compare forecast models side by side and find the best time to leave, so you arrive when you said you would.

WHERE TO GO NEXT
Anchorages, marinas, fuel docks, customs offices and chandleries, reviewed by the cruisers who've been there. Add your own tips and photos as you go.

YOUR LOGBOOK WRITES ITSELF
Every passage is recorded automatically: track, distance, conditions and photos. Your year at sea is written for you.

FAMILY AND FRIENDS CAN FOLLOW ALONG
Give your boat a page and the people back home can watch your progress in real time. You decide what they see, and you can make it private at any time.

SAFETY WHEN IT MATTERS
Send a Sécurité, Pan-Pan or Mayday hail to Master's Mate boats nearby. When seconds matter, the fleet around you knows where you are.

THE CRUISING COMMUNITY
Keep in touch with the boats you meet. Message other captains, join cruising groups for your route or rally, and share the anchorage. You control who can contact you.

ON EVERY SCREEN YOU OWN
Use the same boat on your phone, tablet, laptop and helm display. Everyone aboard can have their own login, with the access you choose.

A NOTE ON THE BETA
Master's Mate is in beta. New boats join through the Founder's Circle at mastersmate.com. If you already have an account, just sign in.

Master's Mate is a navigation aid. Always keep a proper watch and use official charts.