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.
Towing Vessel
SDM 101
MMSI 367520820 · Call sign WDG2939
Not yet on Master's MateType
Towing Vessel
Flag
USALength
17.1 m
Beam
4.4 m
Draft
2.1 m
Call sign
WDG2939
Official No.
1231558
AIS reports
1
Registered in the United States, SDM 101 is a 17.1-metre service vessel. SDM 101 has a beam of 4.4 m and a 2.1 m draft. On the registers she's MMSI 367520820, call sign WDG2939. Join SDM 101 to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like SDM 101.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever SDM 101 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SDM 101 on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim SDM 101 and switch it all on
Free to join · nothing to install to start · cancel anytime
About SDM 101
What kind of vessel is SDM 101?
SDM 101 is a Towing Vessel flagged to United States of America.
What is SDM 101's MMSI?
SDM 101's MMSI is 367520820. Call sign WDG2939.
How big is SDM 101?
SDM 101 is about 17.1 m long, 4.4 m on the beam, drawing 2.1 m.
Is SDM 101 on the Master's Mate Safety Initiative Network?
Not yet. If SDM 101 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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