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.
Passenger (Inspected)
SPARROW
U.S. Official No. 577976
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
30.5 m
First reported
Jun 2026
AIS reports
1
Out of the United States, SPARROW is a 30.5-metre passenger boat. Her registration reads U.S. official number 577976. SPARROW is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard SPARROW safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever 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 · for passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SPARROW on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 SPARROW and switch it all on
Free to join · nothing to install to start · cancel anytime
About SPARROW
What kind of vessel is SPARROW?
SPARROW is a Passenger (Inspected) flagged to United States of America.
What is SPARROW's U.S. Official No.?
SPARROW's U.S. Official No. is 577976.
How big is SPARROW?
SPARROW is about 30.5 m long.
Is SPARROW on the Master's Mate Safety Initiative Network?
Not yet. If SPARROW is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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