Master's MateSafety Initiative Network
The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
Sailing
Gratus
MMSI 367770860 · Call sign WDM6573
Not yet on Master's MateType
Sailing
Flag
USALength
12 m
Beam
6 m
Call sign
WDM6573
Official No.
1266810
First reported
Apr 2026
Last reported
Apr 2026
AIS reports
87
On the American registry, Gratus is a 12-metre sailing cruiser. She carries a beam measuring 6 metres. She's listed under MMSI 367770860, call sign WDM6573. There's a place for Gratus on the Master's Mate Safety Initiative Network — free, community-driven, like AAA for the ocean.
Free forever · No credit card · for cruisers
Sleep easy on the hook aboard Gratus.
GPS-precise anchor-drag alarms, ETA-calibrated weather routing, worldwide charts, and cruisers watching each other’s backs.
Set her anchor watch — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Apr 17, 2026
Position
17.0046° N, 61.7606° W
Sailing the Caribbean? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
Free with your claim · for cruisers
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Gratus on the map. It hands you the full bridge:
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Claim Gratus and switch it all on
Free to join · nothing to install to start · cancel anytime
About Gratus
What kind of vessel is Gratus?
Gratus is a Sailing flagged to United States of America.
Where was Gratus last seen?
Gratus was last reported in the Caribbean in Apr 2026 on public AIS.
What is Gratus's MMSI?
Gratus's MMSI is 367770860. Call sign WDM6573.
How big is Gratus?
Gratus is about 12 m long, 6 m on the beam.
Is Gratus on the Master's Mate Safety Initiative Network?
Not yet. If Gratus is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.