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.

Vessel

SIERRA 8

last seen 42°N 71°W · Jun 2026 · MMSI 369970996

Not yet on Master's Mate

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

SIERRA 8 is a craft. Her registration reads MMSI 369970996. It's free to add SIERRA 8 to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.

Photos of SIERRA 8

Free forever · No credit card

Is SIERRA 8 your boat?

Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.

Claim this boat — free →

Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Live AIS position · Jun 16, 2026 18:25 UTC

Track SIERRA 8 live — sign up free →

Position

41.5366° N, 71.3128° W

Status

Under way (engine)

Speed

0.0 kn

Course

148°

Crossing off the U.S. East Coast? 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

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put SIERRA 8 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.

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

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.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

Systems Monitoring

Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.

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 SIERRA 8 and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About SIERRA 8

What kind of vessel is SIERRA 8?

SIERRA 8 is a vessel.

Where was SIERRA 8 last seen?

SIERRA 8 was last reported in off the U.S. East Coast in Jun 2026 on public AIS.

What is SIERRA 8's MMSI?

SIERRA 8's MMSI is 369970996.

Is SIERRA 8 on the Master's Mate Safety Initiative Network?

Not yet. If SIERRA 8 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).