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.
Recreational
One and Only
MMSI 368025290 · Call sign WDJ9358
Not yet on Master's MateType
Recreational
Flag
USALength
18.1 m
Beam
5.1 m
Draft
2.8 m
Call sign
WDJ9358
Official No.
1284199
Hull ID
SERY1702F718
AIS reports
1
Out of the United States, One and Only is an 18.1-metre pleasure craft. She's built with a 5.1 m beam and a 2.8-metre draft. She broadcasts as MMSI 368025290, call sign WDJ9358. Add One and Only to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
Free forever · No credit card · for recreational captains
Keep One and Only looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever One and Only 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put One and Only 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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim One and Only and switch it all on
Free to join · nothing to install to start · cancel anytime
About One and Only
What kind of vessel is One and Only?
One and Only is a Recreational flagged to United States of America.
What is One and Only's MMSI?
One and Only's MMSI is 368025290. Call sign WDJ9358.
How big is One and Only?
One and Only is about 18.1 m long, 5.1 m on the beam, drawing 2.8 m.
Is One and Only on the Master's Mate Safety Initiative Network?
Not yet. If One and Only is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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