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

SESOK

MMSI 367399110 · Call sign WDE7899

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

22.3 m

Beam

9.8 m

Draft

2.2 m

Call sign

WDE7899

IMO

9502491

Official No.

1217646

AIS reports

On the American registry, SESOK is a 22.3-metre harbour workboat. Below, she has a 9.8-metre beam and a draft of 2.2 m. On AIS she shows as MMSI 367399110, call sign WDE7899, IMO 9502491. Join SESOK 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 SESOK.

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 SESOK 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 SESOK 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 SESOK and switch it all on

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

Claim free → unlock everything

About SESOK

What kind of vessel is SESOK?

SESOK is a Towing Vessel flagged to United States of America.

What is SESOK's MMSI?

SESOK's MMSI is 367399110. Call sign WDE7899. IMO 9502491.

How big is SESOK?

SESOK is about 22.3 m long, 9.8 m on the beam, drawing 2.2 m.

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

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