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
Sierra Queen
MMSI 306136000
Not yet on Master's MateFlag
CUWLength
134 m
IMO
9127928
AIS reports
2
Sierra Queen, a boat listed on the Curaçao registry, measures 134 metres on deck. She's listed under MMSI 306136000, IMO 9127928. Sierra Queen can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card
Is Sierra Queen 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 Sierra Queen 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 Sierra Queen 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 Sierra Queen and switch it all on
Free to join · nothing to install to start · cancel anytime
About Sierra Queen
What kind of vessel is Sierra Queen?
Sierra Queen is a vessel flagged to Curaçao.
What is Sierra Queen's MMSI?
Sierra Queen's MMSI is 306136000. IMO 9127928.
How big is Sierra Queen?
Sierra Queen is about 134 m long.
Is Sierra Queen on the Master's Mate Safety Initiative Network?
Not yet. If Sierra Queen is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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