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)

LT. SAMUEL S. COURSEN

MMSI 366888270 · Call sign WDB3537

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

52.6 m

Beam

14.7 m

Draft

4.3 m

Call sign

WDB3537

Official No.

1138191

AIS reports

LT. SAMUEL S. COURSEN, a passenger boat listed on the the United States registry, measures 52.6 metres on deck. She carries a beam of 14.7 m and a 4.3 m draft. She broadcasts as MMSI 366888270, call sign WDB3537. Keep every soul aboard LT. SAMUEL S. COURSEN covered with the free Master's Mate Safety Initiative Network.

Free forever · No credit card · for passenger & charter operators

Keep every soul aboard LT. SAMUEL S. COURSEN 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 LT. SAMUEL S. COURSEN 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 LT. SAMUEL S. COURSEN 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 LT. SAMUEL S. COURSEN and switch it all on

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About LT. SAMUEL S. COURSEN

What kind of vessel is LT. SAMUEL S. COURSEN?

LT. SAMUEL S. COURSEN is a Passenger (Inspected) flagged to United States of America.

What is LT. SAMUEL S. COURSEN's MMSI?

LT. SAMUEL S. COURSEN's MMSI is 366888270. Call sign WDB3537.

How big is LT. SAMUEL S. COURSEN?

LT. SAMUEL S. COURSEN is about 52.6 m long, 14.7 m on the beam, drawing 4.3 m.

Is LT. SAMUEL S. COURSEN on the Master's Mate Safety Initiative Network?

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