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-14
United States of America · last seen 33°N 117°W · Jun 2026 · MMSI 338924243
Not yet on Master's MateFlag
USAFirst reported
Jun 2026
Last reported
Jun 2026
AIS reports
39
SIERRA-14 is an American craft. On the registers she's MMSI 338924243. SIERRA-14 is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
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Is SIERRA-14 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
Last known position · Jun 3, 2026
Position
32.7031° N, 117.2356° W
Crossing off Southern California? 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-14 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-14 and switch it all on
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About SIERRA-14
What kind of vessel is SIERRA-14?
SIERRA-14 is a vessel flagged to United States of America.
Where was SIERRA-14 last seen?
SIERRA-14 was last reported in off Southern California in Jun 2026 on public AIS.
What is SIERRA-14's MMSI?
SIERRA-14's MMSI is 338924243.
Is SIERRA-14 on the Master's Mate Safety Initiative Network?
Not yet. If SIERRA-14 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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