KOEN
Thunder Bay Island Light in the middle, with the lights within 20 km, in their listed colours.
Thunder Bay Island Light — light characteristic, height, range
One green flash every 10 seconds
Count 10 seconds.Flash green, once.Begin again.
- Characteristic
- Fl G 10s
- Height
- 63 ft · 19 m
- Nominal range
- 16 mi = 26 km
- Structure
- Conical tower with dwelling attached.
- Position
- 45.0373°N, 83.1943°W · MI
Lights nearby
- Thunder Bay Traffic Lighted Bell Buoy TBMorse A (·−) in white · 8.1 km
- Nordmeer Wreck Lighted Buoy WR1Continuous quick green flashes · 11 km
- Stonycroft Point LightContinuous quick white flashes · 12 km
- Alpena Junction Lighted Buoy Al2+1 red flashes every 6 seconds · 16 km
- Alpena Channel Lighted Buoy 2One red flash every 2.5 seconds · 17 km
- Alpena Channel Lighted Buoy 1One green flash every 2 seconds · 17 km
- Alpena Channel Lighted Buoy 3One green flash every 4 seconds · 17 km
- Holcim Channel Range Front LightSteady red light · 17 km
Not for navigation. Use official NOAA charts and USCG Local Notices to Mariners.
Real periods; the phase is reconstructed from a fixed clock (real lights don't keep time with each other).
Sources: U.S. Coast Guard Light List (opens in a new tab) · Checked