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.
Passenger (Uninspected)
DIAMOND SEAS
MMSI 367771580 · Call sign WDJ3805
Not yet on Master's MateType
Passenger (Uninspected)
Flag
USALength
23.1 m
Beam
6.4 m
Draft
1.9 m
Call sign
WDJ3805
Official No.
1254274
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
86
DIAMOND SEAS is a passenger craft registered in the United States, spanning 23.1 metres. She has a 6.4 m beam and a draft measuring 1.9 metres. Her papers read MMSI 367771580, call sign WDJ3805. Bring DIAMOND SEAS aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard DIAMOND SEAS safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 21:32 UTC
Position
37.8069° N, 122.4451° W
Status
Under way (engine)
Speed
0.1 kn
Course
360°
Sailing San Francisco Bay? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put DIAMOND SEAS on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 DIAMOND SEAS and switch it all on
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About DIAMOND SEAS
What kind of vessel is DIAMOND SEAS?
DIAMOND SEAS is a Passenger (Uninspected) flagged to United States of America.
Where was DIAMOND SEAS last seen?
DIAMOND SEAS was last reported in San Francisco Bay in Jun 2026 on public AIS.
What is DIAMOND SEAS's MMSI?
DIAMOND SEAS's MMSI is 367771580. Call sign WDJ3805.
How big is DIAMOND SEAS?
DIAMOND SEAS is about 23.1 m long, 6.4 m on the beam, drawing 1.9 m.
Is DIAMOND SEAS on the Master's Mate Safety Initiative Network?
Not yet. If DIAMOND SEAS is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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