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.
Industrial Vessel
shearwater
MMSI 366897970 · Call sign WDB4396
Not yet on Master's MateType
Industrial Vessel
Flag
USALength
15.2 m
Beam
6.1 m
Draft
2.4 m
Call sign
WDB4396
Official No.
993066
Hull ID
E00E1MHGE393
AIS reports
1
An American cargo vessel, shearwater measures 15.2 metres. She's built with a beam measuring 6.1 metres and a 2.4 m draft. Her papers read MMSI 366897970, call sign WDB4396. There's a place for shearwater on the Master's Mate Safety Initiative Network — free, community-driven, like AAA for the ocean.
Free forever · No credit card · for commercial operators
Eyes on shearwater, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever shearwater 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 commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put shearwater on the map. It hands you the full bridge:
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 shearwater and switch it all on
Free to join · nothing to install to start · cancel anytime
About shearwater
What kind of vessel is shearwater?
shearwater is a Industrial Vessel flagged to United States of America.
What is shearwater's MMSI?
shearwater's MMSI is 366897970. Call sign WDB4396.
How big is shearwater?
shearwater is about 15.2 m long, 6.1 m on the beam, drawing 2.4 m.
Is shearwater on the Master's Mate Safety Initiative Network?
Not yet. If shearwater is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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