KOEN
Cape Ann Light in the middle, with the lights within 20 km, in their listed colours.
Cape Ann Light — light characteristic, height, range
One red flash every 5 seconds
Count 5 seconds.Flash red, once.Begin again.
- Characteristic
- Fl R 5s
- Height
- 166 ft · 51 m
- Nominal range
- 17 nmi = 31 km
- Remarks
- Emergency light of reduced intensity when main light is extinguished. HORN: 2 blasts ev 60s (3s bl-3s si-3s bl-51s si). MRASS-Fog signal is radio activated, during times of reduced visibility, turn marine VHF-FM radio to channel 83A/157.175Mhz. Key microphone 5 times consecutively, to activate fog signal for 60 minutes.
- Position
- 42.6368°N, 70.5749°W · MA

Lights nearby
- Thacher Island North LightSteady yellow light · 289 m
- Straitsmouth LightOne green flash every 6 seconds · 3.0 km
- Avery Ledge Lighted Buoy 2One red flash every 4 seconds · 3.6 km
- Rockport Breakwater Light 6One red flash every 4 seconds · 4.0 km
- ARII Good Harbor Wave Research Lighted BuoyContinuous quick yellow flashes · 4.4 km
- Dry Salvages Lighted Bell Buoy 1One green flash every 2.5 seconds · 4.8 km
- Sandy Bay Breakwater Lighted Gong Buoy 3Continuous quick green flashes · 5.3 km
- Gloucester Inner Harbor Junction Lighted Buoy GH2+1 red flashes every 6 seconds · 7.4 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