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.
Recreational
Slabjack
MMSI 367755220 · Call sign WDJ2097
Not yet on Master's MateType
Recreational
Flag
USALength
17.1 m
Beam
5.3 m
Draft
2.5 m
Call sign
WDJ2097
Official No.
1271803
AIS reports
1
Slabjack, a pleasure craft flying the flag of the United States, measures 17.1 metres on deck. She's built with a 5.3 m beam and a 2.5-metre draft. She's on record as MMSI 367755220, call sign WDJ2097. Put Slabjack on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for recreational captains
Keep Slabjack looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Slabjack 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Slabjack 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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
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 Slabjack and switch it all on
Free to join · nothing to install to start · cancel anytime
About Slabjack
What kind of vessel is Slabjack?
Slabjack is a Recreational flagged to United States of America.
What is Slabjack's MMSI?
Slabjack's MMSI is 367755220. Call sign WDJ2097.
How big is Slabjack?
Slabjack is about 17.1 m long, 5.3 m on the beam, drawing 2.5 m.
Is Slabjack on the Master's Mate Safety Initiative Network?
Not yet. If Slabjack is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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