KOEN
St. Marks Lighthouse in the middle, with the lights within 20 km, in their listed colours.
St. Marks Lighthouse — light characteristic, height, range
One white flash every 2.5 seconds
Count 2.5 seconds.Flash white, once.Begin again.
- Characteristic
- Fl W 2.5s
- Structure
- White brick tower.
- Remarks
- Private Aid. Non-operational March 1st to May 1st and August 15th to October 31st annually.
- Position
- 30.0738°N, 84.1796°W

Lights nearby
- St Marks River Light 11One green flash every 4 seconds · 879 m
- St Marks River Light 10One red flash every 4 seconds · 975 m
- St Marks River Light 14One red flash every 4 seconds · 1.1 km
- St Marks River Lighted Buoy 7One green flash every 4 seconds · 1.6 km
- St Marks River Light 17One green flash every 4 seconds · 1.9 km
- St Marks River Light 26Continuous quick red flashes · 3.0 km
- St Marks River Light 29One green flash every 4 seconds · 3.9 km
- St Marks River Light 34One red flash every 2.5 seconds · 4.6 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