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.

Offshore Supply Vessel

Sargasso

MMSI 367599260 · Call sign WDH2598

Not yet on Master's Mate

Type

Offshore Supply Vessel

Flag

USA

Length

59.4 m

Beam

12.1 m

Draft

4.3 m

Call sign

WDH2598

IMO

9712058

Official No.

1250740

AIS reports

Sargasso, a working craft wearing American colours, measures 59.4 metres on deck. Her hull carries a 12.1-metre beam and a draft of 4.3 m. Look for MMSI 367599260, call sign WDH2598, IMO 9712058. Sargasso 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 Sargasso.

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 Sargasso 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 Sargasso 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 Sargasso and switch it all on

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

Claim free → unlock everything

About Sargasso

What kind of vessel is Sargasso?

Sargasso is a Offshore Supply Vessel flagged to United States of America.

What is Sargasso's MMSI?

Sargasso's MMSI is 367599260. Call sign WDH2598. IMO 9712058.

How big is Sargasso?

Sargasso is about 59.4 m long, 12.1 m on the beam, drawing 4.3 m.

Is Sargasso on the Master's Mate Safety Initiative Network?

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