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.
Recreational
Sidera
MMSI 367572170 · Call sign WDG7920
Not yet on Master's MateType
Recreational
Flag
USALength
13 m
Beam
4.2 m
Draft
2.2 m
Call sign
WDG7920
Official No.
935922
AIS reports
1
Sidera is a weekend cruiser flagged in the United States, 13 metres on deck. Below, she has a beam measuring 4.2 metres and a draft measuring 2.2 metres. On AIS she shows as MMSI 367572170, call sign WDG7920. Claim Sidera free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card · for recreational captains
Keep Sidera looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Sidera 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Sidera on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim Sidera and switch it all on
Free to join · nothing to install to start · cancel anytime
About Sidera
What kind of vessel is Sidera?
Sidera is a Recreational flagged to United States of America.
What is Sidera's MMSI?
Sidera's MMSI is 367572170. Call sign WDG7920.
How big is Sidera?
Sidera is about 13 m long, 4.2 m on the beam, drawing 2.2 m.
Is Sidera on the Master's Mate Safety Initiative Network?
Not yet. If Sidera is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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