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.
Vessel
Leonid Sobolev
MMSI 273365090
Not yet on Master's MateFlag
RUSLength
129 m
IMO
8501000
AIS reports
2
Leonid Sobolev is a Russian vessel, 129 metres overall. Officially she's MMSI 273365090, IMO 8501000. Leonid Sobolev is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
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Is Leonid Sobolev 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 Leonid Sobolev roams, you're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Leonid Sobolev 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 Leonid Sobolev and switch it all on
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About Leonid Sobolev
What kind of vessel is Leonid Sobolev?
Leonid Sobolev is a vessel flagged to Russia.
What is Leonid Sobolev's MMSI?
Leonid Sobolev's MMSI is 273365090. IMO 8501000.
How big is Leonid Sobolev?
Leonid Sobolev is about 129 m long.
Is Leonid Sobolev on the Master's Mate Safety Initiative Network?
Not yet. If Leonid Sobolev is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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