The depression range finder (DRF) was a fire control device used to determine the target's position by observing range and bearing and to calculate firing...

coining the term. In 1881, the British Royal Artillery adopted the depression range finder, which had been developed by Captain H.S.S. Watkin for use by coastal...

casemate structure containing store and telephone rooms, and two Depression Range Finder locations, one combined with a Battery Commander's Post set off...

radar Range ambiguity resolution Cosmic distance ladder Bradley A. Fiske Dazzle camouflage Depression range finder Fire-control system Range-finder painting...

effective range. In 1879, Major H. S. Watkins of the Royal Garrison Artillery invented the depression range finder, the position-range finder and associated...

battery's armament was the subject of several upgrades. In 1898, a depression range finder and telephone system were installed. In 1901, a further BL 6-inch...

by tunnels to the magazine and shell stores, casemate, flanking depression range finder and observation posts, two machine gun posts and the entrance to...

founded in 1894. DRF may also refer to: Depression range finder, a fire control device used to observe the target's range and bearing to calculate firing solutions...

of the No. 1 9.2 inch gun is a raised concrete platform for a Depression Range Finder. Beneath the guns were extensive magazines, which fed ammunition...

includes a central corridor connected to two symmetrically placed depression range finder stations. There is another station which is above ground, standing...

In addition, some base end stations held a depression position finder (DPF) or a coincidence range finder (CRF) that could be used by itself (without...

Coast defence range finding at victorianforts.co.uk Major Watkin's Position Finder at victorianforts.co.uk Watkin depression position finders at victorianforts...

to the gun detachments could be relayed via voice pipes. Three depression range finders were installed on the roof by the late 1890s to aid the guns' targeting...

guns (installed in June 1939), plus a twin 6-pounder battery. A Depression Range Finder MK II was installed and weapon pits for Bren light machine guns...

living room and a scullery. In between both of these were two Depression range finders enabling the guns to accurately fire at their targets. Behind the...

yards (180 m) to the north containing the Battery Command and Depression Range Finder with a Barr & Stroud Rangefinder on a concrete platform to the...

octagonal concrete columns that served as the foundations for the depression range finders (DPFs) mounted atop them. One of these columns has a modern communications...

Kennedy Range and Perth". Geoscience Australia. March 2004. Archived from the original on 10 October 2012. "Department of the Environment - Park Finder - Kennedy...

F45 Depression position finder, Lewis, M1907 – Parts and equipment F46 Finder depression position (Swasey type AII) (Depression position finder) F47...

The Táchira Depression (Spanish: Depresión de Táchira) is a saddle of land connecting the Lake Maracaibo basin to the Orinoco basin in the state of Táchira...

position. Spotting the enemy gun flashes with a depression position finder indicated the submarine was out of range. Most Japanese rounds landed in a nearby...

sights, and prism binoculars". Presumably, the range finders included the company's depression position finder. During World War I, three important kinds...

their accuracy and maximum effective range. Vertical base rangefinding used a single depression position finder (DPF) mounted as high as possible above...

of the New era printing Company. p. 240. "Hypericum perforatum". Plant Finder. St. Louis, Missouri: Missouri Botanical Garden. Retrieved 1 August 2023...

peaks. There is also a 36 inch (90 cm) diameter, bronze azimuth-like "peak finder" on the observatory’s roof to help visitors locate nearby geologic features...

recognize how the application of radio in detection and ranging – what was often called the Radio Range Finder (RRF) – could be of value, particularly in any defensive...

B16001. U.S. Census Bureau. Retrieved December 26, 2022. "American FactFinder—Results". Archived from the original on February 12, 2020. Retrieved May...

running. Ranging gun effectiveness improved to 2,500 metres range. All service Chieftains were subsequently upgraded with the LF2 laser range finder with...

installed for several decades. Many original items remain: the Osborne Fire Finder and its stand, the sink, and the insulated stool which lookouts use during...

improvements. These included range finding through stereoscopic, then coincidence visual range finders, then laser range finders, which were introduced in...