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
MAIN XXI
MMSI 244820227 · Call sign PC4577
Not yet on Master's MateType
Cargo
Flag
NLDLength
30 m
Beam
6 m
Draft
2.3 m
Call sign
PC4577
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
MAIN XXI is a Dutch merchant ship — 30 metres overall. Below, she has a 6-metre beam and a draft measuring 2.3 metres. On the registers she's MMSI 244820227, call sign PC4577. Big or small, every hull benefits from the free Master's Mate Safety Initiative Network — MAIN XXI included.
Free forever · No credit card · for commercial operators
Eyes on MAIN XXI, 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
Live AIS position · Jun 9, 2026 19:25 UTC
Position
51.7872° N, 4.6429° E
Status
Under way (engine)
Speed
0.0 kn
Course
347°
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.
Free with your claim · for commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put MAIN XXI 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 MAIN XXI and switch it all on
Free to join · nothing to install to start · cancel anytime
About MAIN XXI
What kind of vessel is MAIN XXI?
MAIN XXI is a Cargo flagged to Netherlands.
Where was MAIN XXI last seen?
MAIN XXI was last reported in the North Sea in Jun 2026 on public AIS.
What is MAIN XXI's MMSI?
MAIN XXI's MMSI is 244820227. Call sign PC4577.
How big is MAIN XXI?
MAIN XXI is about 30 m long, 6 m on the beam, drawing 2.3 m.
Is MAIN XXI on the Master's Mate Safety Initiative Network?
Not yet. If MAIN XXI is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.