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.

Passenger (Inspected)

WHATCOM CHIEF

MMSI 367156670 · Call sign WT4561

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

28.5 m

Beam

13.4 m

Draft

2.8 m

Call sign

WT4561

Official No.

288249

AIS reports

WHATCOM CHIEF is a passenger ferry on the the United States registry, 28.5 metres long. Below, she has a 13.4 m beam and a draft of 2.8 m. Find her under MMSI 367156670, call sign WT4561. WHATCOM CHIEF can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.

Free forever · No credit card · for passenger & charter operators

Keep every soul aboard WHATCOM CHIEF safe.

Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.

Switch on the safety stack — free →

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

Wherever WHATCOM CHIEF 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 passenger & charter operators

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

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

Distress Mesh

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

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.

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.

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 WHATCOM CHIEF and switch it all on

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

Claim free → unlock everything

About WHATCOM CHIEF

What kind of vessel is WHATCOM CHIEF?

WHATCOM CHIEF is a Passenger (Inspected) flagged to United States of America.

What is WHATCOM CHIEF's MMSI?

WHATCOM CHIEF's MMSI is 367156670. Call sign WT4561.

How big is WHATCOM CHIEF?

WHATCOM CHIEF is about 28.5 m long, 13.4 m on the beam, drawing 2.8 m.

Is WHATCOM CHIEF on the Master's Mate Safety Initiative Network?

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