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 (Uninspected)
Jammer
MMSI 366890430 · Call sign WDB3708
Not yet on Master's MateType
Passenger (Uninspected)
Flag
USALength
18.8 m
Beam
5.5 m
Draft
2.9 m
Call sign
WDB3708
Official No.
1134949
Hull ID
VKY61537J102
AIS reports
1
On the American registry, Jammer is an 18.8-metre passenger vessel. Jammer has a beam of 5.5 m and a 2.9 m draft. Her papers read MMSI 366890430, call sign WDB3708. Bring Jammer aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Jammer 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
Wherever Jammer 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 · for passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Jammer 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 Jammer and switch it all on
Free to join · nothing to install to start · cancel anytime
About Jammer
What kind of vessel is Jammer?
Jammer is a Passenger (Uninspected) flagged to United States of America.
What is Jammer's MMSI?
Jammer's MMSI is 366890430. Call sign WDB3708.
How big is Jammer?
Jammer is about 18.8 m long, 5.5 m on the beam, drawing 2.9 m.
Is Jammer on the Master's Mate Safety Initiative Network?
Not yet. If Jammer is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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