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.
Research Vessel
Isle of June
MMSI 366802280 · Call sign WDA3793
Not yet on Master's MateType
Research Vessel
Flag
USALength
23.8 m
Beam
7.9 m
Draft
3.7 m
Call sign
WDA3793
IMO
8981884
Official No.
1103056
AIS reports
1
An American craft, Isle of June measures 23.8 metres. She's built with a 7.9 m beam and a 3.7-metre draft. Look for MMSI 366802280, call sign WDA3793, IMO 8981884. Bring Isle of June aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card
Is Isle of June your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Isle of June 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Isle of June 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.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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.
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 Isle of June and switch it all on
Free to join · nothing to install to start · cancel anytime
About Isle of June
What kind of vessel is Isle of June?
Isle of June is a Research Vessel flagged to United States of America.
What is Isle of June's MMSI?
Isle of June's MMSI is 366802280. Call sign WDA3793. IMO 8981884.
How big is Isle of June?
Isle of June is about 23.8 m long, 7.9 m on the beam, drawing 3.7 m.
Is Isle of June on the Master's Mate Safety Initiative Network?
Not yet. If Isle of June is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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