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
Joseph Leidy
MMSI 366834540 · Call sign WDF9787
Not yet on Master's MateType
Research Vessel
Flag
USALength
12.3 m
Beam
3.8 m
Draft
1.6 m
Call sign
WDF9787
Official No.
610237
AIS reports
2
On the American registry, Joseph Leidy is a 12.3-metre boat. Joseph Leidy has a 3.8 m beam and a 1.6-metre draft. On AIS she shows as MMSI 366834540, call sign WDF9787. Give Joseph Leidy the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
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Is Joseph Leidy 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 Joseph Leidy 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 Joseph Leidy 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 Joseph Leidy and switch it all on
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About Joseph Leidy
What kind of vessel is Joseph Leidy?
Joseph Leidy is a Research Vessel flagged to United States of America.
What is Joseph Leidy's MMSI?
Joseph Leidy's MMSI is 366834540. Call sign WDF9787.
How big is Joseph Leidy?
Joseph Leidy is about 12.3 m long, 3.8 m on the beam, drawing 1.6 m.
Is Joseph Leidy on the Master's Mate Safety Initiative Network?
Not yet. If Joseph Leidy is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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