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.
Offshore Supply Vessel
Harvey Spirit
MMSI 368584000 · Call sign WDD4830
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
74.7 m
Beam
18.3 m
Draft
5.9 m
Call sign
WDD4830
IMO
9388106
Official No.
582641
AIS reports
2
Harvey Spirit, a working craft flying the American flag, measures 74.7 metres on deck. Below, she has a 18.3 m beam and a draft of 5.9 m. Her papers read MMSI 368584000, call sign WDD4830, IMO 9388106. Harvey Spirit can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card · for working boats
Built for boats that work — like Harvey Spirit.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Harvey Spirit 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Harvey Spirit on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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 Harvey Spirit and switch it all on
Free to join · nothing to install to start · cancel anytime
About Harvey Spirit
What kind of vessel is Harvey Spirit?
Harvey Spirit is a Offshore Supply Vessel flagged to United States of America.
What is Harvey Spirit's MMSI?
Harvey Spirit's MMSI is 368584000. Call sign WDD4830. IMO 9388106.
How big is Harvey Spirit?
Harvey Spirit is about 74.7 m long, 18.3 m on the beam, drawing 5.9 m.
Is Harvey Spirit on the Master's Mate Safety Initiative Network?
Not yet. If Harvey Spirit is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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