KOEN
De Tour Reef Light in the middle, with the lights within 20 km, in their listed colours.
De Tour Reef Light — light characteristic, height, range
One white flash every 10 seconds
Count 10 seconds.Flash white, once.Begin again.
- Characteristic
- Fl W 10s
- Height
- 74 ft · 23 m
- Nominal range
- 16 mi = 26 km
- Remarks
- Red from 079.5° to 189.5°. HORN: 2 blasts ev 60s (3s bl-3s si-3s bl-51s si). Fog signal operates by keying VHF FM Marine radio channel 83A five times.
- Position
- 45.9491°N, 83.9031°W · MI

Lights nearby
- Crab Island Shoal Lighted Bell Buoy 4One red flash every 2.5 seconds · 1.8 km
- De Tour Passage Lighted Buoy 2One red flash every 6 seconds · 2.2 km
- Frying Pan Island Light 7Continuous quick green flashes · 4.1 km
- Detour Harbor Entrance Light 2One red flash every 4 seconds · 5.2 km
- Watsons Reefs Light 9AOne green flash every 4 seconds · 6.4 km
- Pipe Island Shoal Lighted Buoy 1One green flash every 2.5 seconds · 6.8 km
- Pipe Island Lighted Buoy 12One red flash every 4 seconds · 7.4 km
- Pipe Island LightOne white flash every 5 seconds · 7.5 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