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.
Cargo
WILLEM-JR
MMSI 244700050 · Call sign PC3870
Not yet on Master's MateType
Cargo
Flag
NLDLength
108 m
Beam
12 m
Draft
3 m
Call sign
PC3870
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
WILLEM-JR is a Dutch 108-metre ocean freighter. Below, she has 12 metres in the beam and a draft of 3 m. Officially she's MMSI 244700050, call sign PC3870. It's free to add WILLEM-JR to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card · for commercial operators
Eyes on WILLEM-JR, 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
Last known position · Jun 4, 2026
Position
51.5045° N, 3.6437° E
Transiting 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.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put WILLEM-JR 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 WILLEM-JR and switch it all on
Free to join · nothing to install to start · cancel anytime
About WILLEM-JR
What kind of vessel is WILLEM-JR?
WILLEM-JR is a Cargo flagged to Netherlands.
Where was WILLEM-JR last seen?
WILLEM-JR was last reported in the North Sea in Jun 2026 on public AIS.
What is WILLEM-JR's MMSI?
WILLEM-JR's MMSI is 244700050. Call sign PC3870.
How big is WILLEM-JR?
WILLEM-JR is about 108 m long, 12 m on the beam, drawing 3 m.
Is WILLEM-JR on the Master's Mate Safety Initiative Network?
Not yet. If WILLEM-JR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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