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
2s Complement
MMSI 368277450 · Call sign WDN4044
Not yet on Master's MateType
Recreational
Flag
USALength
12.8 m
Beam
4.3 m
Draft
2.7 m
Call sign
WDN4044
Official No.
1327922
Hull ID
CRSXJ153I122
AIS reports
1
2s Complement flies the American flag — a 12.8-metre private cruiser. She has a 4.3 m beam and a draft measuring 2.7 metres. On AIS she shows as MMSI 368277450, call sign WDN4044. 2s Complement is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for recreational captains
Keep 2s Complement 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 2s Complement 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 2s Complement 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 2s Complement and switch it all on
Free to join · nothing to install to start · cancel anytime
About 2s Complement
What kind of vessel is 2s Complement?
2s Complement is a Recreational flagged to United States of America.
What is 2s Complement's MMSI?
2s Complement's MMSI is 368277450. Call sign WDN4044.
How big is 2s Complement?
2s Complement is about 12.8 m long, 4.3 m on the beam, drawing 2.7 m.
Is 2s Complement on the Master's Mate Safety Initiative Network?
Not yet. If 2s Complement is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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