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.
UNSPECIFIED
J. H. POLHEMUS
U.S. Official No. 563326
Not yet on Master's MateType
UNSPECIFIED
Flag
USALength
26.7 m
Beam
11.3 m
Draft
2.3 m
First reported
Jun 2026
AIS reports
1
J. H. POLHEMUS is an American craft — 26.7 metres overall. She has a beam measuring 11.3 metres and a draft of 2.3 m. Officially she's U.S. official number 563326. Give J. H. POLHEMUS the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
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Is J. H. POLHEMUS 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
Wherever J. H. POLHEMUS 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put J. H. POLHEMUS 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 J. H. POLHEMUS and switch it all on
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About J. H. POLHEMUS
What kind of vessel is J. H. POLHEMUS?
J. H. POLHEMUS is a UNSPECIFIED flagged to United States of America.
What is J. H. POLHEMUS's U.S. Official No.?
J. H. POLHEMUS's U.S. Official No. is 563326.
How big is J. H. POLHEMUS?
J. H. POLHEMUS is about 26.7 m long, 11.3 m on the beam, drawing 2.3 m.
Is J. H. POLHEMUS on the Master's Mate Safety Initiative Network?
Not yet. If J. H. POLHEMUS is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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