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
SIENA
MMSI 366897560 · Call sign WDP3418
Not yet on Master's MateType
Recreational
Flag
USALength
14.1 m
Beam
4.3 m
Draft
2 m
Call sign
WDP3418
Official No.
1141845
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
88
SIENA is a private cruiser on the the United States registry, 14.1 metres long. She has a beam measuring 4.3 metres and a draft of 2 m. Officially she's MMSI 366897560, call sign WDP3418. SIENA can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card · for recreational captains
Keep SIENA 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
Live AIS position · Jun 9, 2026 10:01 UTC
Position
47.6454° N, 122.3111° W
Status
Under way (engine)
Speed
0.0 kn
Course
152°
Cruising the Salish 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SIENA 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 SIENA and switch it all on
Free to join · nothing to install to start · cancel anytime
About SIENA
What kind of vessel is SIENA?
SIENA is a Recreational flagged to United States of America.
Where was SIENA last seen?
SIENA was last reported in the Salish Sea in Jun 2026 on public AIS.
What is SIENA's MMSI?
SIENA's MMSI is 366897560. Call sign WDP3418.
How big is SIENA?
SIENA is about 14.1 m long, 4.3 m on the beam, drawing 2 m.
Is SIENA on the Master's Mate Safety Initiative Network?
Not yet. If SIENA is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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