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Старый 07-12-2008, 12:10   #20
Hitman_SN
Aircraftsman
 
Регистрация: Dec 2008
Сообщений: 7
Here is some information for you about visually sighting the masts/periscopes:

III. USE OF PERISCOPE.

"Periscope showing 1.5 to 2 meters can not be seen more than 4,000 meters, provided a suitable speed is maintained and the favorable side for attack chosen."

"With binoculars it has not been possible to distinguish the periscope even at 2,000 meters."


This information comes from an american intelligence publication of WW1, which was quoting a german source.
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