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Observation Tower, Fort Miles, Delaware 02

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Description

Photos taken in July, 2014.
Image size
1944x2592px 704.53 KB
Make
SONY
Model
DSC-F828
Shutter Speed
10/6400 second
Aperture
F/8.0
Focal Length
11 mm
ISO Speed
200
Date Taken
Jul 1, 2014, 10:08:17 AM
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Comments2
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In the San Francisco Bay area, there were plenty of mountains and hills by the shore so towers weren't needed. Depression position finders en.wikipedia.org/wiki/Depressi… were placed in the so-called base-end stations on the hilltops and triangulation was used to determine range and direction. Information was phoned into the command center where it was fed into analog computers which calculated speed, wind strength and direction, tide level, temperature, curvature of the earth, wear on the gun barrels, etc. The elevation and azimuth figures which resulted were given to the gun crews who could sometimes get a hit with the first shot. A lot of dry-fire practice was involved because the guns might be fired only once a year.