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

Rockhopper

Recreational · United States of America · last seen 54°N 10°E · Jun 2026 · MMSI 367160860 · Call sign WDI3866

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

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

S/Y ROCKHOPPER is a 11.9-meter recreational sailing yacht flying the flag of the United States of America. Identified by MMSI 367160860 and call sign WDI3866, she has a beam of 3.9 meters and a draft of 2.7 meters. Cruisers can connect with fellow mariners and enhance their safety by joining the Master's Mate Safety Initiative Network.

Free forever · No credit card · for recreational captains

Keep 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

Last known position · Jun 4, 2026

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Position

53.5433° N, 9.9808° E

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 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 Rockhopper and switch it all on

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About Rockhopper

What kind of vessel is Rockhopper?

Rockhopper is a Recreational flagged to United States of America.

Where was Rockhopper last seen?

Rockhopper was last reported in the Baltic Sea in Jun 2026 on public AIS.

What is Rockhopper's MMSI?

Rockhopper's MMSI is 367160860. Call sign WDI3866.

How big is Rockhopper?

Rockhopper is about 11.9 m long, 3.9 m on the beam, drawing 2.7 m.

Is Rockhopper on the Master's Mate Safety Initiative Network?

Not yet. If Rockhopper is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).