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.
Towing Vessel
DOLPHIN IV
MMSI 366874690 · Call sign WDB2327
Not yet on Master's MateType
Towing Vessel
Flag
USALength
34.6 m
Beam
9.8 m
Draft
4.3 m
Call sign
WDB2327
IMO
8213029
Official No.
655036
AIS reports
1
DOLPHIN IV is an American harbour workboat — 34.6 metres overall. She has 9.8 metres in the beam and a draft of 4.3 m. On the registers she's MMSI 366874690, call sign WDB2327, IMO 8213029. Sign DOLPHIN IV up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
Free forever · No credit card · for working boats
Built for boats that work — like DOLPHIN IV.
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
Wherever DOLPHIN IV 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 DOLPHIN IV 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 DOLPHIN IV and switch it all on
Free to join · nothing to install to start · cancel anytime
About DOLPHIN IV
What kind of vessel is DOLPHIN IV?
DOLPHIN IV is a Towing Vessel flagged to United States of America.
What is DOLPHIN IV's MMSI?
DOLPHIN IV's MMSI is 366874690. Call sign WDB2327. IMO 8213029.
How big is DOLPHIN IV?
DOLPHIN IV is about 34.6 m long, 9.8 m on the beam, drawing 4.3 m.
Is DOLPHIN IV on the Master's Mate Safety Initiative Network?
Not yet. If DOLPHIN IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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