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

CHALLENGER II

Hong Kong S.A.R. · last seen 22°N 114°E · Jun 2026 · MMSI 477995125

Not yet on Master's Mate

Flag

HKG

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

CHALLENGER II flies the Hong Kong flag — a boat. Look for MMSI 477995125. Join CHALLENGER II to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.

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Is CHALLENGER II 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 3, 2026

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Position

22.3132° N, 114.1978° E

Crossing the South China Sea? 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 CHALLENGER II 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 CHALLENGER II and switch it all on

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About CHALLENGER II

What kind of vessel is CHALLENGER II?

CHALLENGER II is a vessel flagged to Hong Kong S.A.R..

Where was CHALLENGER II last seen?

CHALLENGER II was last reported in the South China Sea in Jun 2026 on public AIS.

What is CHALLENGER II's MMSI?

CHALLENGER II's MMSI is 477995125.

Is CHALLENGER II on the Master's Mate Safety Initiative Network?

Not yet. If CHALLENGER II is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).