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
TB MARINA 1620
MMSI 525200009 · Call sign YDA3961
Not yet on Master's MateType
Tug
Flag
IDNLength
26 m
Beam
8 m
Draft
4.8 m
Call sign
YDA3961
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
TB MARINA 1620, an Indonesian tugboat, measures 26 metres on deck. She's built with a 8 m beam and a 4.8 m draft. Look for MMSI 525200009, call sign YDA3961. Working vessels like TB MARINA 1620 are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.
Free forever · No credit card · for working boats
Built for boats that work — like TB MARINA 1620.
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
Last known position · Jun 4, 2026
Position
2.1522° S, 104.9324° E
Wherever TB MARINA 1620 roams, 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 TB MARINA 1620 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 TB MARINA 1620 and switch it all on
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About TB MARINA 1620
What kind of vessel is TB MARINA 1620?
TB MARINA 1620 is a Tug flagged to Indonesia.
Where was TB MARINA 1620 last seen?
TB MARINA 1620 was last reported in around 2°S 105°E in Jun 2026 on public AIS.
What is TB MARINA 1620's MMSI?
TB MARINA 1620's MMSI is 525200009. Call sign YDA3961.
How big is TB MARINA 1620?
TB MARINA 1620 is about 26 m long, 8 m on the beam, drawing 4.8 m.
Is TB MARINA 1620 on the Master's Mate Safety Initiative Network?
Not yet. If TB MARINA 1620 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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