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.
Tug
CG THUNDER BAY
MMSI 366999983 · Call sign NNTB
Not yet on Master's MateType
Tug
Flag
USALength
42 m
Beam
12 m
Draft
4 m
Call sign
NNTB
IMO
8635203
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
35
CG THUNDER BAY is a tug hailing from the United States, 42 metres on deck. She has 12 metres in the beam and a draft measuring 4 metres. On the registers she's MMSI 366999983, call sign NNTB, IMO 8635203. Claim CG THUNDER BAY free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card · for working boats
Built for boats that work — like CG THUNDER BAY.
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
Live AIS position · Jun 9, 2026 19:13 UTC
Position
42.3683° N, 71.0504° W
Status
Moored
Speed
0.0 kn
Course
334°
Destination
BASE BOSTON
ETA
06-07 22:40 UTC
Working the Gulf of Maine? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put CG THUNDER BAY 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 CG THUNDER BAY and switch it all on
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About CG THUNDER BAY
What kind of vessel is CG THUNDER BAY?
CG THUNDER BAY is a Tug flagged to United States of America.
Where was CG THUNDER BAY last seen?
CG THUNDER BAY was last reported in the Gulf of Maine in Jun 2026 on public AIS.
What is CG THUNDER BAY's MMSI?
CG THUNDER BAY's MMSI is 366999983. Call sign NNTB. IMO 8635203.
How big is CG THUNDER BAY?
CG THUNDER BAY is about 42 m long, 12 m on the beam, drawing 4 m.
Is CG THUNDER BAY on the Master's Mate Safety Initiative Network?
Not yet. If CG THUNDER BAY is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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