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
CASTOR
MMSI 244730396 · Call sign PB9478
Not yet on Master's MateType
Pleasure Craft
Flag
NLDLength
46 m
Beam
8 m
Draft
3.2 m
Call sign
PB9478
IMO
8633114
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
86
On the Dutch registry, CASTOR is a 46-metre weekend cruiser. Her hull carries a beam measuring 8 metres and a draft of 3.2 m. She's on record as MMSI 244730396, call sign PB9478, IMO 8633114. Put CASTOR on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for recreational captains
Keep CASTOR 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
Live AIS position · Jun 9, 2026 09:24 UTC
Position
51.9039° N, 4.4859° E
Status
Under way (engine)
Speed
0.0 kn
Course
316°
ETA
11-04 20:40 UTC
Cruising the North Sea? 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 CASTOR 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 CASTOR and switch it all on
Free to join · nothing to install to start · cancel anytime
About CASTOR
What kind of vessel is CASTOR?
CASTOR is a Pleasure Craft flagged to Netherlands.
Where was CASTOR last seen?
CASTOR was last reported in the North Sea in Jun 2026 on public AIS.
What is CASTOR's MMSI?
CASTOR's MMSI is 244730396. Call sign PB9478. IMO 8633114.
How big is CASTOR?
CASTOR is about 46 m long, 8 m on the beam, drawing 3.2 m.
Is CASTOR on the Master's Mate Safety Initiative Network?
Not yet. If CASTOR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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