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 (Uninspected)
Joni B
MMSI 368205240 · Call sign WDM4311
Not yet on Master's MateType
Passenger (Uninspected)
Flag
USALength
9.5 m
Beam
3.4 m
Draft
1.9 m
Call sign
WDM4311
Official No.
696999
Hull ID
JCAPT2920286
AIS reports
1
Joni B, a passenger boat under the American flag, measures 9.5 metres on deck. She's built with a beam of 3.4 m and a 1.9 m draft. Her registration reads MMSI 368205240, call sign WDM4311. For a boat that carries people, Joni B can lean on the Master's Mate Safety Initiative Network — free distress alerting and a fleet that's paying attention.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Joni B 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 Joni B 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 Joni B 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 Joni B and switch it all on
Free to join · nothing to install to start · cancel anytime
About Joni B
What kind of vessel is Joni B?
Joni B is a Passenger (Uninspected) flagged to United States of America.
What is Joni B's MMSI?
Joni B's MMSI is 368205240. Call sign WDM4311.
How big is Joni B?
Joni B is about 9.5 m long, 3.4 m on the beam, drawing 1.9 m.
Is Joni B on the Master's Mate Safety Initiative Network?
Not yet. If Joni B is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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