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
SAPPHIRE II
MMSI 367638280 · Call sign WDP6473
Not yet on Master's MateFlag
USACall sign
WDP6473
Official No.
926208
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
20
SAPPHIRE II is an American boat. She's listed under MMSI 367638280, call sign WDP6473. It's free to add SAPPHIRE II 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
Is SAPPHIRE 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.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 3, 2026
Position
21.3134° N, 157.8667° W
Crossing the Hawaiian Islands? 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 SAPPHIRE 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 SAPPHIRE II and switch it all on
Free to join · nothing to install to start · cancel anytime
About SAPPHIRE II
What kind of vessel is SAPPHIRE II?
SAPPHIRE II is a vessel flagged to United States of America.
Where was SAPPHIRE II last seen?
SAPPHIRE II was last reported in the Hawaiian Islands in Jun 2026 on public AIS.
What is SAPPHIRE II's MMSI?
SAPPHIRE II's MMSI is 367638280. Call sign WDP6473.
Is SAPPHIRE II on the Master's Mate Safety Initiative Network?
Not yet. If SAPPHIRE II is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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