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.

Commercial Fishing Vessel

Grand Slam

MMSI 368363480 · Call sign WDP5442

Not yet on Master's Mate

Type

Commercial Fishing Vessel

Flag

USA

Length

15.2 m

Beam

5.3 m

Draft

2.5 m

Call sign

WDP5442

Official No.

1343623

Hull ID

HKU54002K022

AIS reports

On the American registry, Grand Slam is a 15.2-metre offshore fishing boat. Grand Slam has 5.3 metres in the beam and a 2.5-metre draft. Find her under MMSI 368363480, call sign WDP5442. Working boats like Grand Slam spend long hours offshore — the free Master's Mate Safety Initiative Network puts a distress mesh and a watching fleet within reach.

Free forever · No credit card · for working captains

Know where the fleet is. Get Grand Slam home safe.

Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.

Keep the fleet in sight — free →

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

Wherever Grand Slam 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 captains

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

Joining the Safety Initiative Network doesn't just put Grand Slam 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.

Weather & Routing

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

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.

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 Grand Slam and switch it all on

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

Claim free → unlock everything

About Grand Slam

What kind of vessel is Grand Slam?

Grand Slam is a Commercial Fishing Vessel flagged to United States of America.

What is Grand Slam's MMSI?

Grand Slam's MMSI is 368363480. Call sign WDP5442.

How big is Grand Slam?

Grand Slam is about 15.2 m long, 5.3 m on the beam, drawing 2.5 m.

Is Grand Slam on the Master's Mate Safety Initiative Network?

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