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

MAR LO

MMSI 366951170 · Call sign WRB3951

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

17.3 m

Beam

6.7 m

Draft

2.1 m

Call sign

WRB3951

Official No.

631838

AIS reports

MAR LO flies the American flag — a 17.3-metre harbour workboat. She has a beam measuring 6.7 metres and a draft of 2.1 m. On AIS she shows as MMSI 366951170, call sign WRB3951. MAR LO belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.

Free forever · No credit card · for working boats

Built for boats that work — like MAR LO.

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 MAR LO 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 MAR LO 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 MAR LO and switch it all on

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

Claim free → unlock everything

About MAR LO

What kind of vessel is MAR LO?

MAR LO is a Towing Vessel flagged to United States of America.

What is MAR LO's MMSI?

MAR LO's MMSI is 366951170. Call sign WRB3951.

How big is MAR LO?

MAR LO is about 17.3 m long, 6.7 m on the beam, drawing 2.1 m.

Is MAR LO on the Master's Mate Safety Initiative Network?

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