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
Arctic Tern
MMSI 367548680 · Call sign WDG5636
Not yet on Master's MateType
Recreational
Flag
USALength
16 m
Beam
4.8 m
Draft
3.4 m
Call sign
WDG5636
Official No.
1239327
AIS reports
1
On the American registry, Arctic Tern is a 16-metre recreational vessel. She has a beam of 4.8 m and a draft measuring 3.4 metres. Her registration reads MMSI 367548680, call sign WDG5636. Whether she's at the dock or out for the weekend, Arctic Tern is covered by the free Master's Mate Safety Initiative Network — alarms, weather, and a watching fleet.
Free forever · No credit card · for recreational captains
Keep Arctic Tern 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 Arctic Tern 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 Arctic Tern 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 Arctic Tern and switch it all on
Free to join · nothing to install to start · cancel anytime
About Arctic Tern
What kind of vessel is Arctic Tern?
Arctic Tern is a Recreational flagged to United States of America.
What is Arctic Tern's MMSI?
Arctic Tern's MMSI is 367548680. Call sign WDG5636.
How big is Arctic Tern?
Arctic Tern is about 16 m long, 4.8 m on the beam, drawing 3.4 m.
Is Arctic Tern on the Master's Mate Safety Initiative Network?
Not yet. If Arctic Tern is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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