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
GC 21
Singapore · last seen 0°N 4°E · Jun 2026 · MMSI 563073090
Not yet on Master's MateFlag
SGPFirst reported
Jun 2026
Last reported
Jun 2026
AIS reports
53
GC 21 flies the Singaporean flag — a boat. On AIS she appears as MMSI 563073090. GC 21 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 GC 21 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 4, 2026
Position
0.0833° N, 3.9333° E
Wherever GC 21 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 GC 21 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 GC 21 and switch it all on
Free to join · nothing to install to start · cancel anytime
About GC 21
What kind of vessel is GC 21?
GC 21 is a vessel flagged to Singapore.
Where was GC 21 last seen?
GC 21 was last reported in around 0°N 4°E in Jun 2026 on public AIS.
What is GC 21's MMSI?
GC 21's MMSI is 563073090.
Is GC 21 on the Master's Mate Safety Initiative Network?
Not yet. If GC 21 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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