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(Q108561817)
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Understen lighthouse main light
main light in Understen lighthouse
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Statements
instance of
main light
0 references
part of
Understen lighthouse
0 references
service entry
1916
1 reference
imported from Wikimedia project
English Wikipedia
focal height
48
metre
2 references
stated in
NGA List of Lights, Radio Aids and Fog Signals
reference URL
https://msi.nga.mil/api/publications/download?key=16694312/SFH00000/NIMA_LOL/Pub116/Pub116bk.pdf
publication date
2021
page(s)
137
imported from Wikimedia project
English Wikipedia
lighthouse range
23
nautical mile
light characteristic
Fl(4) W 15s
2 references
stated in
NGA List of Lights, Radio Aids and Fog Signals
reference URL
https://msi.nga.mil/api/publications/download?key=16694312/SFH00000/NIMA_LOL/Pub116/Pub116bk.pdf
publication date
2021
page(s)
137
imported from Wikimedia project
English Wikipedia
light sector
0°-360°
light characteristic
Fl(4) W 15s
focal height
48
metre
color
white
0 references
light characteristic
Fl(4) W 15s
statement is subject of
white light flashing four times every 15 seconds
applies to part
main light
1 reference
stated in
NGA List of Lights, Radio Aids and Fog Signals
reference URL
https://msi.nga.mil/api/publications/download?key=16694312/SFH00000/NIMA_LOL/Pub116/Pub116bk.pdf
publication date
2021
page(s)
137
type of lens
third order Fresnel lens
0 references
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