focal height of lighthouse (Q1409551)
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vertical distance between the light source of a lighthouse and the sea level
- height of focal plane
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | focal height of lighthouse |
vertical distance between the light source of a lighthouse and the sea level |
|
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Sitelinks
Wikipedia(2 entries)
- dewiki Feuerhöhe
- nlwiki Lichthoogte