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.
Passenger (Inspected)
Sounder
MMSI 368295070 · Call sign WDN6007
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
9.1 m
Beam
3 m
Draft
0.9 m
Call sign
WDN6007
Official No.
1330373
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
20
Sounder is a passenger boat registered in the United States, measuring 9.1 metres. She's built with a 3-metre beam and a 0.9 m draft. Find her under MMSI 368295070, call sign WDN6007. For a boat that carries people, Sounder can lean on the Master's Mate Safety Initiative Network — free distress alerting and a fleet that's paying attention.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Sounder safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 2, 2026
Position
48.4881° N, 122.6815° W
Sailing the Salish 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 · for passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Sounder on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim Sounder and switch it all on
Free to join · nothing to install to start · cancel anytime
About Sounder
What kind of vessel is Sounder?
Sounder is a Passenger (Inspected) flagged to United States of America.
Where was Sounder last seen?
Sounder was last reported in the Salish Sea in Jun 2026 on public AIS.
What is Sounder's MMSI?
Sounder's MMSI is 368295070. Call sign WDN6007.
How big is Sounder?
Sounder is about 9.1 m long, 3 m on the beam, drawing 0.9 m.
Is Sounder on the Master's Mate Safety Initiative Network?
Not yet. If Sounder is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.