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.
Pilot
SIERRA
MMSI 249829000 · Call sign 9HC3164
Not yet on Master's MateType
Pilot
Flag
MLTLength
15 m
Beam
4 m
Draft
2.2 m
Call sign
9HC3164
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
3
A Maltese workboat, SIERRA measures 15 metres. She carries a 4 m beam and a 2.2 m draft. On AIS she appears as MMSI 249829000, call sign 9HC3164. It's free to add SIERRA to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card · for working boats
Built for boats that work — like SIERRA.
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
Last known position · Jun 2, 2026
Position
35.8200° N, 14.5310° E
Working the Mediterranean? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put SIERRA 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 SIERRA and switch it all on
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About SIERRA
What kind of vessel is SIERRA?
SIERRA is a Pilot flagged to Malta.
Where was SIERRA last seen?
SIERRA was last reported in the Mediterranean in Jun 2026 on public AIS.
What is SIERRA's MMSI?
SIERRA's MMSI is 249829000. Call sign 9HC3164.
How big is SIERRA?
SIERRA is about 15 m long, 4 m on the beam, drawing 2.2 m.
Is SIERRA on the Master's Mate Safety Initiative Network?
Not yet. If SIERRA is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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