KOEN
Martin Reef Light in the middle, with the lights within 20 km, in their listed colours.
Martin Reef Light — light characteristic, height, range
One red flash every 10 seconds
Count 10 seconds.Flash red, once.Begin again.
- Characteristic
- Fl R 10s
- Height
- 65 ft · 20 m
- Nominal range
- 12 mi = 19 km
- Structure
- White square tower on concrete crib.
- Remarks
- HORN: 1 blast ev 30s (3s bl). Operates by keying microphone five times on VHF-FM Ch. 83A.
- Position
- 45.9131°N, 84.1486°W · MI

Lights nearby
- Pomeroy Reef Lighted Gong Buoy 2PROne red flash every 4 seconds · 4.8 km
- Les Cheneaux Island Lighted Buoy 2One red flash every 6 seconds · 6.4 km
- Les Cheneaux Island Lighted Buoy 4One red flash every 2.5 seconds · 8.0 km
- Les Cheneaux Island Lighted Buoy 3One green flash every 6 seconds · 8.2 km
- Les Cheneaux Island Lighted Buoy 5One green flash every 2.5 seconds · 8.8 km
- Crow Island Leading LightWhite, 3 s on and 3 s off · 9.4 km
- Penny Island Point Lighted Buoy 1One green flash every 4 seconds · 11 km
- Mckay Bay Range Rear LightSteady red light · 12 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