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

Crosby Guardian

MMSI 368424000 · Call sign WDH3357

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

35.1 m

Beam

12.2 m

Draft

4.5 m

Call sign

WDH3357

IMO

9572288

Official No.

1051102

AIS reports

Crosby Guardian, a service vessel under American registration, measures 35.1 metres on deck. Crosby Guardian has 12.2 metres in the beam and a 4.5 m draft. She's listed under MMSI 368424000, call sign WDH3357, IMO 9572288. Join Crosby Guardian to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.

Free forever · No credit card · for working boats

Built for boats that work — like Crosby Guardian.

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 Crosby Guardian 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 Crosby Guardian 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 Crosby Guardian and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About Crosby Guardian

What kind of vessel is Crosby Guardian?

Crosby Guardian is a Towing Vessel flagged to United States of America.

What is Crosby Guardian's MMSI?

Crosby Guardian's MMSI is 368424000. Call sign WDH3357. IMO 9572288.

How big is Crosby Guardian?

Crosby Guardian is about 35.1 m long, 12.2 m on the beam, drawing 4.5 m.

Is Crosby Guardian on the Master's Mate Safety Initiative Network?

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