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 (Inspected)
Sundiver
MMSI 367083620 · Call sign WDI4978
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
16.2 m
Beam
5.1 m
Draft
0.9 m
Call sign
WDI4978
Official No.
956018
Hull ID
RDWX0002G888
AIS reports
2
On the American registry, Sundiver is a 16.2-metre excursion vessel. She's built with a beam of 5.1 m and a 0.9-metre draft. Officially she's MMSI 367083620, call sign WDI4978. Sundiver can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Sundiver 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
Wherever Sundiver 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Sundiver 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 Sundiver and switch it all on
Free to join · nothing to install to start · cancel anytime
About Sundiver
What kind of vessel is Sundiver?
Sundiver is a Passenger (Inspected) flagged to United States of America.
What is Sundiver's MMSI?
Sundiver's MMSI is 367083620. Call sign WDI4978.
How big is Sundiver?
Sundiver is about 16.2 m long, 5.1 m on the beam, drawing 0.9 m.
Is Sundiver on the Master's Mate Safety Initiative Network?
Not yet. If Sundiver is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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