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.
Offshore Supply Vessel
Manta Ray
MMSI 366947790 · Call sign WDB7772
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
26.7 m
Beam
14.6 m
Draft
2.4 m
Call sign
WDB7772
IMO
8765876
Official No.
639744
AIS reports
1
Manta Ray is an American harbour workboat, 26.7 metres long. She has a beam of 14.6 m and a draft of 2.4 m. On the registers she's MMSI 366947790, call sign WDB7772, IMO 8765876. Working vessels like Manta Ray are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.
Free forever · No credit card · for working boats
Built for boats that work — like Manta Ray.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Manta Ray roams, 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Manta Ray on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim Manta Ray and switch it all on
Free to join · nothing to install to start · cancel anytime
About Manta Ray
What kind of vessel is Manta Ray?
Manta Ray is a Offshore Supply Vessel flagged to United States of America.
What is Manta Ray's MMSI?
Manta Ray's MMSI is 366947790. Call sign WDB7772. IMO 8765876.
How big is Manta Ray?
Manta Ray is about 26.7 m long, 14.6 m on the beam, drawing 2.4 m.
Is Manta Ray on the Master's Mate Safety Initiative Network?
Not yet. If Manta Ray is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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