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
S/Y ROCKHOPPER
MMSI 367160860 · Call sign WDI3866
Not yet on Master's MateType
Recreational
Flag
USALength
11.9 m
Beam
3.9 m
Draft
2.7 m
Call sign
WDI3866
Official No.
1195457
Hull ID
CYQ40181I607
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
87
Registered in the United States, S/Y ROCKHOPPER is an 11.9-metre cruising boat. She's built with 3.9 metres in the beam and a 2.7-metre draft. Officially she's MMSI 367160860, call sign WDI3866. Whether she's at the dock or out for the weekend, S/Y ROCKHOPPER is covered by the free Master's Mate Safety Initiative Network — alarms, weather, and a watching fleet.
Free forever · No credit card · for recreational captains
Keep S/Y ROCKHOPPER 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 21:42 UTC
Position
53.5433° N, 9.9808° E
Status
Under way (engine)
Speed
0.0 kn
Course
222°
Cruising the Baltic 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 S/Y ROCKHOPPER 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 S/Y ROCKHOPPER and switch it all on
Free to join · nothing to install to start · cancel anytime
About S/Y ROCKHOPPER
What kind of vessel is S/Y ROCKHOPPER?
S/Y ROCKHOPPER is a Recreational flagged to United States of America.
Where was S/Y ROCKHOPPER last seen?
S/Y ROCKHOPPER was last reported in the Baltic Sea in Jun 2026 on public AIS.
What is S/Y ROCKHOPPER's MMSI?
S/Y ROCKHOPPER's MMSI is 367160860. Call sign WDI3866.
How big is S/Y ROCKHOPPER?
S/Y ROCKHOPPER is about 11.9 m long, 3.9 m on the beam, drawing 2.7 m.
Is S/Y ROCKHOPPER on the Master's Mate Safety Initiative Network?
Not yet. If S/Y ROCKHOPPER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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