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.

Towing Vessel

Michael S

MMSI 366976390 · Call sign WDB9471

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

21.5 m

Beam

8.5 m

Draft

3.5 m

Call sign

WDB9471

Official No.

1161512

AIS reports

Michael S, an American utility vessel, measures 21.5 metres on deck. She's built with 8.5 metres in the beam and a 3.5-metre draft. On AIS she appears as MMSI 366976390, call sign WDB9471. Michael S is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

Free forever · No credit card · for working boats

Built for boats that work — like Michael S.

Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.

Rig her out — free →

Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever Michael S 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 working boats

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put Michael S on the map. It hands you the full bridge:

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.

Weather & Routing

GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

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 Michael S and switch it all on

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About Michael S

What kind of vessel is Michael S?

Michael S is a Towing Vessel flagged to United States of America.

What is Michael S's MMSI?

Michael S's MMSI is 366976390. Call sign WDB9471.

How big is Michael S?

Michael S is about 21.5 m long, 8.5 m on the beam, drawing 3.5 m.

Is Michael S on the Master's Mate Safety Initiative Network?

Not yet. If Michael S is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).