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)
Rock Bottom
MMSI 368117190 · Call sign WDL2978
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
13.7 m
Beam
4.5 m
Draft
1.1 m
Call sign
WDL2978
Official No.
1160702
Hull ID
MDZ48434D404
AIS reports
1
Registered in the United States, Rock Bottom is a 13.7-metre passenger ship. Below, she has a 4.5 m beam and a draft measuring 1.1 metres. She broadcasts as MMSI 368117190, call sign WDL2978. Keep every soul aboard Rock Bottom covered with the free Master's Mate Safety Initiative Network.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Rock Bottom 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 Rock Bottom 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 Rock Bottom 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 Rock Bottom and switch it all on
Free to join · nothing to install to start · cancel anytime
About Rock Bottom
What kind of vessel is Rock Bottom?
Rock Bottom is a Passenger (Inspected) flagged to United States of America.
What is Rock Bottom's MMSI?
Rock Bottom's MMSI is 368117190. Call sign WDL2978.
How big is Rock Bottom?
Rock Bottom is about 13.7 m long, 4.5 m on the beam, drawing 1.1 m.
Is Rock Bottom on the Master's Mate Safety Initiative Network?
Not yet. If Rock Bottom is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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