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.
Tug
SWS ENDURANCE
MMSI 232020313 · Call sign MEPU4
Not yet on Master's MateType
Tug
Flag
GBRLength
19 m
Beam
8 m
Draft
2.2 m
Call sign
MEPU4
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
73
SWS ENDURANCE, a British harbour tug, measures 19 metres on deck. She has a beam of 8 m and a draft of 2.2 m. On AIS she appears as MMSI 232020313, call sign MEPU4. Add SWS ENDURANCE to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
Free forever · No credit card · for working boats
Built for boats that work — like SWS ENDURANCE.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 16:52 UTC
Position
51.5132° N, 0.1213° E
Status
Under way (engine)
Speed
7.1 kn
Course
68°
Destination
LONDON
ETA
11-20 23:00 UTC
Working 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SWS ENDURANCE on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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 SWS ENDURANCE and switch it all on
Free to join · nothing to install to start · cancel anytime
About SWS ENDURANCE
What kind of vessel is SWS ENDURANCE?
SWS ENDURANCE is a Tug flagged to United Kingdom.
Where was SWS ENDURANCE last seen?
SWS ENDURANCE was last reported in the North Sea in Jun 2026 on public AIS.
What is SWS ENDURANCE's MMSI?
SWS ENDURANCE's MMSI is 232020313. Call sign MEPU4.
How big is SWS ENDURANCE?
SWS ENDURANCE is about 19 m long, 8 m on the beam, drawing 2.2 m.
Is SWS ENDURANCE on the Master's Mate Safety Initiative Network?
Not yet. If SWS ENDURANCE 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.