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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.
Tanker
HYDROVAC 21
MMSI 244700198 · Call sign PD3723
Not yet on Master's MateType
Tanker
Flag
NLDLength
26 m
Beam
5 m
Draft
2.2 m
Call sign
PD3723
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
HYDROVAC 21, a Dutch tank ship, measures 26 metres on deck. She carries 5 metres in the beam and a 2.2 m draft. She's listed under MMSI 244700198, call sign PD3723. Sign HYDROVAC 21 up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
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Eyes on HYDROVAC 21, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
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Live AIS position · Jun 9, 2026 22:09 UTC
Position
51.7865° N, 4.6443° E
Status
Moored
Speed
0.0 kn
Course
254°
Destination
DORDRECHT
ETA
12-29 09:30 UTC
Transiting the North Sea? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put HYDROVAC 21 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.
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About HYDROVAC 21
What kind of vessel is HYDROVAC 21?
HYDROVAC 21 is a Tanker flagged to Netherlands.
Where was HYDROVAC 21 last seen?
HYDROVAC 21 was last reported in the North Sea in Jun 2026 on public AIS.
What is HYDROVAC 21's MMSI?
HYDROVAC 21's MMSI is 244700198. Call sign PD3723.
How big is HYDROVAC 21?
HYDROVAC 21 is about 26 m long, 5 m on the beam, drawing 2.2 m.
Is HYDROVAC 21 on the Master's Mate Safety Initiative Network?
Not yet. If HYDROVAC 21 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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