| Key | Value |
| building | lighthouse |
| building:architecture | other |
| heritage | 2 |
| heritage:operator | nrhp |
| heritage:website | https://npgallery.nps.gov/AssetDetail/NRIS/76000117 |
| historic | heritage |
| int_ref | J 24.00 |
| man_made | lighthouse |
| nat_ref | LLNR 1120 |
| note | centered on NGS position |
| note:position | NOAA/USCG surveyed location. Please use for calibration. |
| note:seamark | Electronic Navigation Charts track the diffferent parts of seamarks (light, fog_signal, buoy, etc.) in separate files, that are updated seperately. Individual sources are needed to track updates sanely. |
| nrhp:criteria | (A) |
| nrhp:inscription_date | 1976-06-18 |
| ref:nrhp | 76000117 |
| seamark:fog_signal:category | horn |
| seamark:fog_signal:group | 1 |
| seamark:fog_signal:information | 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. |
| seamark:fog_signal:period | 15.0 |
| seamark:fog_signal:ref | US001945996800050 |
| seamark:fog_signal:sequence | 2.0+(13.0) |
| seamark:fog_signal:source | US,US,reprt,1stCGD,LNM 35/18 |
| seamark:fog_signal:source_date | 20180828 |
| seamark:landmark:category | tower |
| seamark:landmark:conspicuity | conspicuous |
| seamark:landmark:function | light_support |
| seamark:landmark:height | 27.7 |
| seamark:landmark:ref | US001945997100050 |
| seamark:landmark:source | US,US,graph,Chart 13326 |
| seamark:landmark:source_date | 200404 |
| seamark:landmark:status | permanent |
| seamark:light:character | Fl |
| seamark:light:colour | white |
| seamark:light:emergency:category | emergency |
| seamark:light:emergency:character | Fl |
| seamark:light:emergency:colour | white |
| seamark:light:emergency:exhibition | night |
| seamark:light:emergency:group | 2 |
| seamark:light:emergency:height | 27.7 |
| seamark:light:emergency:information | Reduced intensity when main light is extinguished |
| seamark:light:emergency:period | 20.0 |
| seamark:light:emergency:range | 18.0 |
| seamark:light:emergency:ref | US001945997200050 |
| seamark:light:emergency:sequence | 0.2+(4.8)+0.2+(14.8) |
| seamark:light:emergency:source | US,US,reprt,1stCGD,LNM 45/08 |
| seamark:light:emergency:source_date | 20040401 |
| seamark:light:emergency:visibility | unintensified |
| seamark:light:exhibition | night |
| seamark:light:group | 2 |
| seamark:light:height | 27.7 |
| seamark:light:period | 20.0 |
| seamark:light:range | 18.0 |
| seamark:light:ref | US001945997300050 |
| seamark:light:sequence | 0.2+(4.8)+0.2+(14.8) |
| seamark:light:source | US,US,reprt,1stCGD,LNM 45/08 |
| seamark:light:source_date | 20040401 |
| seamark:name | Libby Island Light |
| seamark:type | landmark |
| source:position | https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=PD1001 |
| source:seamark | NOAA Electronic Navigation Chart US4ME50M (Approach) |
| source:seamark:date | 2023-10-23 |
| start_date | 1823 |
| wikidata | Q6540433 |
| wikipedia | en:Libby Island Light |