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)
Stroller IV
MMSI 368328320 · Call sign WDN9577
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
14.8 m
Beam
3.7 m
Draft
1.4 m
Call sign
WDN9577
Official No.
233119
AIS reports
1
Stroller IV, a ferry vessel hailing from the United States, measures 14.8 metres on deck. Below, she has a beam of 3.7 m and a draft of 1.4 m. Find her under MMSI 368328320, call sign WDN9577. Keep every soul aboard Stroller IV covered with the free Master's Mate Safety Initiative Network.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Stroller IV 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 Stroller 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Stroller IV 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 Stroller IV and switch it all on
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About Stroller IV
What kind of vessel is Stroller IV?
Stroller IV is a Passenger (Inspected) flagged to United States of America.
What is Stroller IV's MMSI?
Stroller IV's MMSI is 368328320. Call sign WDN9577.
How big is Stroller IV?
Stroller IV is about 14.8 m long, 3.7 m on the beam, drawing 1.4 m.
Is Stroller IV on the Master's Mate Safety Initiative Network?
Not yet. If Stroller IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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