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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.
Tug
SD TEMPEST
MMSI 235118697 · Call sign 2JTB4
Not yet on Master's MateType
Tug
Flag
GBRLength
32 m
Beam
13 m
Draft
6 m
Call sign
2JTB4
IMO
9803637
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
87
Registered in the United Kingdom, SD TEMPEST is a 32-metre tugboat. She carries a beam measuring 13 metres and a 6 m draft. On AIS she appears as MMSI 235118697, call sign 2JTB4, IMO 9803637. Join SD TEMPEST to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like SD TEMPEST.
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 11:15 UTC
Position
50.8032° N, 1.1119° W
Speed
0.0 kn
Course
8°
Destination
PORTSMOUTH
ETA
12-04 15:30 UTC
Working the English Channel? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put SD TEMPEST 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 SD TEMPEST and switch it all on
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About SD TEMPEST
What kind of vessel is SD TEMPEST?
SD TEMPEST is a Tug flagged to United Kingdom.
Where was SD TEMPEST last seen?
SD TEMPEST was last reported in the English Channel in Jun 2026 on public AIS.
What is SD TEMPEST's MMSI?
SD TEMPEST's MMSI is 235118697. Call sign 2JTB4. IMO 9803637.
How big is SD TEMPEST?
SD TEMPEST is about 32 m long, 13 m on the beam, drawing 6 m.
Is SD TEMPEST on the Master's Mate Safety Initiative Network?
Not yet. If SD TEMPEST is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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