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

Sandra Holt

MMSI 368161640 · Call sign WDL7597

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

47.9 m

Beam

14.6 m

Draft

3.7 m

Call sign

WDL7597

Official No.

1304627

AIS reports

Sandra Holt, a harbour workboat flagged in the United States, measures 47.9 metres on deck. Her hull carries a 14.6-metre beam and a draft of 3.7 m. She broadcasts as MMSI 368161640, call sign WDL7597. Put Sandra Holt on the free Master's Mate Safety Initiative Network and keep the working fleet looking out for each other.

Free forever · No credit card · for working boats

Built for boats that work — like Sandra Holt.

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 Sandra Holt 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 Sandra Holt 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 Sandra Holt and switch it all on

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

Claim free → unlock everything

About Sandra Holt

What kind of vessel is Sandra Holt?

Sandra Holt is a Towing Vessel flagged to United States of America.

What is Sandra Holt's MMSI?

Sandra Holt's MMSI is 368161640. Call sign WDL7597.

How big is Sandra Holt?

Sandra Holt is about 47.9 m long, 14.6 m on the beam, drawing 3.7 m.

Is Sandra Holt on the Master's Mate Safety Initiative Network?

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