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
The Sparrow
MMSI 368104250 · Call sign WDK9497
Not yet on Master's MateFlag
USACall sign
WDK9497
Official No.
HA2093CP
AIS reports
1
On the American registry, The Sparrow is a vessel. On AIS she appears as MMSI 368104250, call sign WDK9497. Claim The Sparrow free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card
Is The Sparrow 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 The Sparrow 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 The Sparrow 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 The Sparrow and switch it all on
Free to join · nothing to install to start · cancel anytime
About The Sparrow
What kind of vessel is The Sparrow?
The Sparrow is a vessel flagged to United States of America.
What is The Sparrow's MMSI?
The Sparrow's MMSI is 368104250. Call sign WDK9497.
Is The Sparrow on the Master's Mate Safety Initiative Network?
Not yet. If The Sparrow is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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