KOEN
Joga Shima (城ヶ島灯台) in the middle, with the lights within 20 km, in their listed colours.
Joga Shima (城ヶ島灯台) — light characteristic, height, range
One white flash every 15 seconds
Count 15 seconds.Flash white, once.Begin again.
- Characteristic
- Fl W 15s
- Height
- 30 m
- Nominal range
- 16 nmi = 30 km
- Type
- light major
- Position
- 35.1351°N, 139.6111°E

Lights nearby
- Green, 2 s on and 2 s off · 564 m
- Jogashima (I Shima)3 red flashes every 12 seconds · 592 m
- Misaki Ko (Misaki Ko)Green, 3 s on and 3 s off · 1.5 km
- Awa Saki (安房崎灯台)One white flash every 4 seconds · 1.8 km
- Moroiso Saki (Moroiso Saki)White, 4 s on and 4 s off · 2.3 km
- Makuti Ko (Makuti Ko)One white flash every 4 seconds · 6.2 km
- Kamegi Ko (Kamegi Ko)9 quick white flashes every 15 seconds · 7.5 km
- Odawa Wan (Odawa Wan)Red, 2 s on and 2 s off · 8.1 km
Not for navigation. Use the country's official charts and Notices to Mariners.
Real periods; the phase is reconstructed from a fixed clock (real lights don't keep time with each other).
Sources: OpenStreetMap seamarks (OSM) (opens in a new tab) · Checked