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.

Oil Recovery

Sentinel

MMSI 368137450 · Call sign WDL5054

Not yet on Master's Mate

Type

Oil Recovery

Flag

USA

Length

15.1 m

Beam

4.5 m

Draft

1.4 m

Call sign

WDL5054

Official No.

1049874

AIS reports

Sentinel is a cargo vessel listed on the the United States registry, 15.1 metres from stem to stern. Sentinel has a beam of 4.5 m and a 1.4-metre draft. On the registers she's MMSI 368137450, call sign WDL5054. Sentinel can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.

Free forever · No credit card · for commercial operators

Eyes on Sentinel, around the clock.

Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.

Put her on the dashboard — free →

Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever Sentinel 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 commercial operators

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put Sentinel on the map. It hands you the full bridge:

Live AIS & Traffic

See every vessel around you in real time. Closest-approach warnings before they matter.

Systems Monitoring

Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

Weather & Routing

GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.

Anchor Watch

GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.

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 Sentinel and switch it all on

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

Claim free → unlock everything

About Sentinel

What kind of vessel is Sentinel?

Sentinel is a Oil Recovery flagged to United States of America.

What is Sentinel's MMSI?

Sentinel's MMSI is 368137450. Call sign WDL5054.

How big is Sentinel?

Sentinel is about 15.1 m long, 4.5 m on the beam, drawing 1.4 m.

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

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