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)
Mantis
MMSI 367618290 · Call sign WDH4492
Not yet on Master's MateType
Passenger (Uninspected)
Flag
USALength
10.7 m
Beam
3.2 m
Draft
1 m
Call sign
WDH4492
Official No.
1224655
AIS reports
1
Mantis, a ferry on the the United States registry, measures 10.7 metres on deck. She carries a beam of 3.2 m and a 1-metre draft. She's on record as MMSI 367618290, call sign WDH4492. The Master's Mate Safety Initiative Network welcomes Mantis — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Mantis 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 Mantis 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 Mantis 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 Mantis and switch it all on
Free to join · nothing to install to start · cancel anytime
About Mantis
What kind of vessel is Mantis?
Mantis is a Passenger (Uninspected) flagged to United States of America.
What is Mantis's MMSI?
Mantis's MMSI is 367618290. Call sign WDH4492.
How big is Mantis?
Mantis is about 10.7 m long, 3.2 m on the beam, drawing 1 m.
Is Mantis on the Master's Mate Safety Initiative Network?
Not yet. If Mantis is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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