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
POLAR SEAL
MMSI 368434020 · Call sign WDQ5366
Not yet on Master's MateType
Recreational
Flag
USALength
11.8 m
Beam
3.9 m
Draft
2.9 m
Call sign
WDQ5366
Official No.
1356867
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
4
POLAR SEAL, a cruising boat under the American flag, measures 11.8 metres on deck. She carries 3.9 metres in the beam and a 2.9-metre draft. Find her under MMSI 368434020, call sign WDQ5366. Claim POLAR SEAL free and let the Master's Mate Safety Initiative Network keep an eye on her, on the water or off.
Free forever · No credit card · for recreational captains
Keep POLAR SEAL 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
Last known position · Jun 2, 2026
Position
38.7757° N, 76.5682° W
Cruising Chesapeake Bay? 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 POLAR SEAL 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 POLAR SEAL and switch it all on
Free to join · nothing to install to start · cancel anytime
About POLAR SEAL
What kind of vessel is POLAR SEAL?
POLAR SEAL is a Recreational flagged to United States of America.
Where was POLAR SEAL last seen?
POLAR SEAL was last reported in Chesapeake Bay in Jun 2026 on public AIS.
What is POLAR SEAL's MMSI?
POLAR SEAL's MMSI is 368434020. Call sign WDQ5366.
How big is POLAR SEAL?
POLAR SEAL is about 11.8 m long, 3.9 m on the beam, drawing 2.9 m.
Is POLAR SEAL on the Master's Mate Safety Initiative Network?
Not yet. If POLAR SEAL is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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