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)
CHIEF
MMSI 367040560 · Call sign WDC5406
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
12.1 m
Beam
4.1 m
Draft
1.8 m
Call sign
WDC5406
Official No.
682467
AIS reports
1
Registered in the United States, CHIEF is a 12.1-metre ferry. She's built with a 4.1-metre beam and a 1.8-metre draft. On AIS she shows as MMSI 367040560, call sign WDC5406. Keep every soul aboard CHIEF covered with the free Master's Mate Safety Initiative Network.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard CHIEF 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 CHIEF 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 CHIEF 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 CHIEF and switch it all on
Free to join · nothing to install to start · cancel anytime
About CHIEF
What kind of vessel is CHIEF?
CHIEF is a Passenger (Inspected) flagged to United States of America.
What is CHIEF's MMSI?
CHIEF's MMSI is 367040560. Call sign WDC5406.
How big is CHIEF?
CHIEF is about 12.1 m long, 4.1 m on the beam, drawing 1.8 m.
Is CHIEF on the Master's Mate Safety Initiative Network?
Not yet. If CHIEF is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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