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

Sun River City

MMSI 367590890 · Call sign WDG9761

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

21.3 m

Beam

7.7 m

Draft

2.3 m

Call sign

WDG9761

IMO

8971607

Official No.

999702

AIS reports

Sun River City, a harbour workboat wearing American colours, measures 21.3 metres on deck. Her hull carries 7.7 metres in the beam and a draft of 2.3 m. On AIS she shows as MMSI 367590890, call sign WDG9761, IMO 8971607. Sun River City earns her keep on the water; the free Master's Mate Safety Initiative Network keeps a watching fleet and a distress mesh close at hand.

Free forever · No credit card · for working boats

Built for boats that work — like Sun River City.

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 Sun River City 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 Sun River City 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 Sun River City and switch it all on

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

Claim free → unlock everything

About Sun River City

What kind of vessel is Sun River City?

Sun River City is a Towing Vessel flagged to United States of America.

What is Sun River City's MMSI?

Sun River City's MMSI is 367590890. Call sign WDG9761. IMO 8971607.

How big is Sun River City?

Sun River City is about 21.3 m long, 7.7 m on the beam, drawing 2.3 m.

Is Sun River City on the Master's Mate Safety Initiative Network?

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