KOEN
Hongdo (홍도등대) in the middle, with the lights within 20 km, in their listed colours.
Hongdo (홍도등대) — light characteristic, height, range
One white flash every 10 seconds
Count 10 seconds.Flash white, once.Begin again.
- Characteristic
- Fl W 10s 117m 21M
- Height
- 117 m
- Nominal range
- 21 nmi = 39 km
- Type
- Landfall / major light
- Position
- 34.5368°N, 128.7330°E · South Sea coast

Lights nearby
- Deunggado (등가도등표)2 white flashes every 5 seconds · 15 km
- Bugyeodo (북여도등표)2 white flashes every 5 seconds · 17 km
- Daegueulbido (대구을비도등표)2 white flashes every 5 seconds · 17 km
- Daebyeongdaedo (대병대도등표)One green flash every 5 seconds · 19 km
- Maemuldo Hang (매물도항 동방파제 등대)One green flash every 5 seconds · 19 km
- Maemuldo Hang (매물도항 서방파제 등대)One red flash every 5 seconds · 19 km
- Somaemuldo (소매물도등대)One white flash every 13 seconds · 19 km
- Somaemuldo (소매물도등표)Continuous quick white flashes · 20 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: KHOA light list (국립해양조사원 등대표) (opens in a new tab) · Checked