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.
Search & Rescue
DEFENDER-04
MMSI 345026012 · Call sign BR-04
Not yet on Master's MateType
Search & Rescue
Flag
MEXLength
9 m
Beam
3 m
Draft
1 m
Call sign
BR-04
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
23
On the Mexican registry, DEFENDER-04 is a 9-metre vessel. Her hull carries a 3 m beam and a draft of 1 m. She's listed under MMSI 345026012, call sign BR-04. Sign DEFENDER-04 up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
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Is DEFENDER-04 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.
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Last known position · Jun 2, 2026
Position
32.3264° N, 117.0974° 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.
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Joining the Safety Initiative Network doesn't just put DEFENDER-04 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 DEFENDER-04 and switch it all on
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About DEFENDER-04
What kind of vessel is DEFENDER-04?
DEFENDER-04 is a Search & Rescue flagged to Mexico.
Where was DEFENDER-04 last seen?
DEFENDER-04 was last reported in off Southern California in Jun 2026 on public AIS.
What is DEFENDER-04's MMSI?
DEFENDER-04's MMSI is 345026012. Call sign BR-04.
How big is DEFENDER-04?
DEFENDER-04 is about 9 m long, 3 m on the beam, drawing 1 m.
Is DEFENDER-04 on the Master's Mate Safety Initiative Network?
Not yet. If DEFENDER-04 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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