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

Eric S. Grimm

MMSI 367333770 · Call sign WDH3369

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

23.8 m

Beam

8 m

Draft

2.3 m

Call sign

WDH3369

Official No.

506097

AIS reports

Eric S. Grimm, an American workboat, measures 23.8 metres on deck. Eric S. Grimm has a beam measuring 8 metres and a 2.3 m draft. On AIS she shows as MMSI 367333770, call sign WDH3369. Give Eric S. Grimm the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.

Free forever · No credit card · for working boats

Built for boats that work — like Eric S. Grimm.

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 Eric S. Grimm 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 Eric S. Grimm 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 Eric S. Grimm and switch it all on

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Claim free → unlock everything

About Eric S. Grimm

What kind of vessel is Eric S. Grimm?

Eric S. Grimm is a Towing Vessel flagged to United States of America.

What is Eric S. Grimm's MMSI?

Eric S. Grimm's MMSI is 367333770. Call sign WDH3369.

How big is Eric S. Grimm?

Eric S. Grimm is about 23.8 m long, 8 m on the beam, drawing 2.3 m.

Is Eric S. Grimm on the Master's Mate Safety Initiative Network?

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