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.
Pleasure Craft
EXCALIBUR
MMSI 338465871 · Call sign EXCAL
Not yet on Master's MateType
Pleasure Craft
Flag
USALength
58 m
Beam
16 m
Draft
4 m
Call sign
EXCAL
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
75
An American pleasure craft, EXCALIBUR measures 58 metres. She's built with a beam of 16 m and a 4 m draft. On AIS she appears as MMSI 338465871, call sign EXCAL. EXCALIBUR is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for recreational captains
Keep EXCALIBUR looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 4, 2026
Position
43.7525° N, 87.7014° W
Cruising Lake Michigan? 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put EXCALIBUR on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim EXCALIBUR and switch it all on
Free to join · nothing to install to start · cancel anytime
About EXCALIBUR
What kind of vessel is EXCALIBUR?
EXCALIBUR is a Pleasure Craft flagged to United States of America.
Where was EXCALIBUR last seen?
EXCALIBUR was last reported in Lake Michigan in Jun 2026 on public AIS.
What is EXCALIBUR's MMSI?
EXCALIBUR's MMSI is 338465871. Call sign EXCAL.
How big is EXCALIBUR?
EXCALIBUR is about 58 m long, 16 m on the beam, drawing 4 m.
Is EXCALIBUR on the Master's Mate Safety Initiative Network?
Not yet. If EXCALIBUR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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