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
SEA SPONGE
MMSI 368314220 · Call sign WDN8082
Not yet on Master's MateFlag
USACall sign
WDN8082
Official No.
OR790AGM
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
23
SEA SPONGE is a boat, flying the flag of the United States. Find her under MMSI 368314220, call sign WDN8082. Give SEA SPONGE the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
Free forever · No credit card
Is SEA SPONGE 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 2, 2026
Position
45.6099° N, 122.6455° W
Wherever SEA SPONGE 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 SEA SPONGE 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 SEA SPONGE and switch it all on
Free to join · nothing to install to start · cancel anytime
About SEA SPONGE
What kind of vessel is SEA SPONGE?
SEA SPONGE is a vessel flagged to United States of America.
Where was SEA SPONGE last seen?
SEA SPONGE was last reported in around 46°N 123°W in Jun 2026 on public AIS.
What is SEA SPONGE's MMSI?
SEA SPONGE's MMSI is 368314220. Call sign WDN8082.
Is SEA SPONGE on the Master's Mate Safety Initiative Network?
Not yet. If SEA SPONGE is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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