KOEN
Boston Light in the middle, with the lights within 20 km, in their listed colours.
Boston Light — light characteristic, height, range
One white flash every 10 seconds
Count 10 seconds.Flash white, once.Begin again.
- Characteristic
- Fl W 10s
- Height
- 102 ft · 31 m
- Nominal range
- 27 nmi = 50 km
- Structure
- On white conical tower.
- Remarks
- Emergency light of reduced intensity when main light is extinguished. Two emergency lights may be visable from 336° to 001° and from 156° to 181°. HORN: 1 blast ev 30s (3s bl). 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
- 42.3280°N, 70.8901°W · MA
Lights nearby
- Little Brewster Island Dock LightOne yellow flash every 2.5 seconds · 223 m
- Nantasket Roads Channel Lighted Buoy 4One red flash every 4 seconds · 949 m
- Nantasket Roads Channel Lighted Buoy 6One red flash every 2.5 seconds · 1.2 km
- Nantasket Roads Channel Lighted Bell Buoy 3One green flash every 4 seconds · 1.3 km
- Nantasket Roads Channel Lighted Buoy 7One green flash every 2.5 seconds · 1.5 km
- Nantasket Roads Channel Lighted Buoy 9One green flash every 4 seconds · 2.0 km
- Nantasket Roads Channel Lighted Buoy TN2+1 red flashes every 6 seconds · 2.3 km
- Georges Island Rocks Lighted Buoy 3Continuous quick green flashes · 2.5 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