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)
American Constitution
MMSI 368023770 · Call sign WDJ9210
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
72.8 m
Beam
16.8 m
Draft
3.4 m
Call sign
WDJ9210
IMO
9901518
Official No.
1279981
AIS reports
1
American Constitution flies the American flag — a 72.8-metre excursion vessel. She's built with 16.8 metres in the beam and a 3.4-metre draft. Find her under MMSI 368023770, call sign WDJ9210, IMO 9901518. There's a place for American Constitution on the Master's Mate Safety Initiative Network — free, community-driven, like AAA for the ocean.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard American Constitution 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 American Constitution 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 American Constitution 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 American Constitution and switch it all on
Free to join · nothing to install to start · cancel anytime
About American Constitution
What kind of vessel is American Constitution?
American Constitution is a Passenger (Inspected) flagged to United States of America.
What is American Constitution's MMSI?
American Constitution's MMSI is 368023770. Call sign WDJ9210. IMO 9901518.
How big is American Constitution?
American Constitution is about 72.8 m long, 16.8 m on the beam, drawing 3.4 m.
Is American Constitution on the Master's Mate Safety Initiative Network?
Not yet. If American Constitution is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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