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.
Passenger (Inspected)
Great Blue
MMSI 368444270 · Call sign WDQ6481
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
12.2 m
Beam
3.7 m
Draft
1.1 m
Call sign
WDQ6481
Official No.
1362266
Hull ID
TXR10319B225
AIS reports
1
Great Blue is an American 12.2-metre passenger vessel. Great Blue has a 3.7 m beam and a 1.1 m draft. On AIS she appears as MMSI 368444270, call sign WDQ6481. Great Blue is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Great Blue safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Great Blue 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Great Blue on the map. It hands you the full bridge:
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.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 Great Blue and switch it all on
Free to join · nothing to install to start · cancel anytime
About Great Blue
What kind of vessel is Great Blue?
Great Blue is a Passenger (Inspected) flagged to United States of America.
What is Great Blue's MMSI?
Great Blue's MMSI is 368444270. Call sign WDQ6481.
How big is Great Blue?
Great Blue is about 12.2 m long, 3.7 m on the beam, drawing 1.1 m.
Is Great Blue on the Master's Mate Safety Initiative Network?
Not yet. If Great Blue is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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