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- Depression_position_finder abstract "A depression position finder (DPF) is an observation instrument that was used in the fire control system of the U.S. Coast Artillery to locate targets in range and/or azimuth as part of the process of directing the fire of a battery of coast defense guns or mortars. These instruments, which contained telescopes on massive, finely geared mountings, were located variously in base end stations, DPF bunkers or pillboxes, or built into concrete gun emplacements. To measure range correctly, a DPF instrument had to be configured for the specific site at which it was emplaced, and had to be adjusted during the day for the level of the tide at that site. DPF instruments were used beginning in the 1890s and continuing through WW2.".
- Depression_position_finder thumbnail DPF_and_Azimuth_Scope.jpg?width=300.
- Depression_position_finder wikiPageID "27268689".
- Depression_position_finder wikiPageRevisionID "577511083".
- Depression_position_finder hasPhotoCollection Depression_position_finder.
- Depression_position_finder subject Category:Coastal_artillery.
- Depression_position_finder comment "A depression position finder (DPF) is an observation instrument that was used in the fire control system of the U.S. Coast Artillery to locate targets in range and/or azimuth as part of the process of directing the fire of a battery of coast defense guns or mortars. These instruments, which contained telescopes on massive, finely geared mountings, were located variously in base end stations, DPF bunkers or pillboxes, or built into concrete gun emplacements.".
- Depression_position_finder label "Depression position finder".
- Depression_position_finder sameAs m.0jt8cvw.
- Depression_position_finder sameAs Q5260914.
- Depression_position_finder sameAs Q5260914.
- Depression_position_finder wasDerivedFrom Depression_position_finder?oldid=577511083.
- Depression_position_finder depiction DPF_and_Azimuth_Scope.jpg.
- Depression_position_finder isPrimaryTopicOf Depression_position_finder.