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
HENRY B BIGELOW
MMSI 369991000 · Call sign WTDF
Not yet on Master's MateFlag
USALength
64 m
Beam
15 m
Call sign
WTDF
IMO
93490570
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
31
An American vessel, HENRY B BIGELOW measures 64 metres. She carries a beam of 15 m. She broadcasts as MMSI 369991000, call sign WTDF. The Master's Mate Safety Initiative Network welcomes HENRY B BIGELOW — free to join, cruiser-run, and always on watch.
Free forever · No credit card
Is HENRY B BIGELOW 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
Last known position · Jun 4, 2026
Position
41.5294° N, 71.3133° W
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 HENRY B BIGELOW 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 HENRY B BIGELOW and switch it all on
Free to join · nothing to install to start · cancel anytime
About HENRY B BIGELOW
What kind of vessel is HENRY B BIGELOW?
HENRY B BIGELOW is a vessel flagged to United States of America.
Where was HENRY B BIGELOW last seen?
HENRY B BIGELOW was last reported in off the U.S. East Coast in Jun 2026 on public AIS.
What is HENRY B BIGELOW's MMSI?
HENRY B BIGELOW's MMSI is 369991000. Call sign WTDF. IMO 93490570.
How big is HENRY B BIGELOW?
HENRY B BIGELOW is about 64 m long, 15 m on the beam.
Is HENRY B BIGELOW on the Master's Mate Safety Initiative Network?
Not yet. If HENRY B BIGELOW is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.