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
NIWC 303
United States of America · last seen 33°N 117°W · Jun 2026 · MMSI 366991478
Not yet on Master's MateFlag
USAFirst reported
Jun 2026
Last reported
Jun 2026
AIS reports
48
NIWC 303 flies the American flag — a vessel. On AIS she shows as MMSI 366991478. Sign NIWC 303 up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
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Is NIWC 303 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
32.7033° N, 117.2361° 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 NIWC 303 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 NIWC 303 and switch it all on
Free to join · nothing to install to start · cancel anytime
About NIWC 303
What kind of vessel is NIWC 303?
NIWC 303 is a vessel flagged to United States of America.
Where was NIWC 303 last seen?
NIWC 303 was last reported in off Southern California in Jun 2026 on public AIS.
What is NIWC 303's MMSI?
NIWC 303's MMSI is 366991478.
Is NIWC 303 on the Master's Mate Safety Initiative Network?
Not yet. If NIWC 303 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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