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
Big lefty
MMSI 367608440 · Call sign WDH3548
Not yet on Master's MateFlag
USACall sign
WDH3548
Official No.
WN1748SA
AIS reports
1
Big lefty is an American vessel. She's listed under MMSI 367608440, call sign WDH3548. Claim Big lefty free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card
Is Big lefty 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 Big lefty 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 Big lefty 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 Big lefty and switch it all on
Free to join · nothing to install to start · cancel anytime
About Big lefty
What kind of vessel is Big lefty?
Big lefty is a vessel flagged to United States of America.
What is Big lefty's MMSI?
Big lefty's MMSI is 367608440. Call sign WDH3548.
Is Big lefty on the Master's Mate Safety Initiative Network?
Not yet. If Big lefty is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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