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09-01-10, 11:48 PM

Here is what The Uboat Commander's Handbook has to say about raised periscopes.:

"23.) The periscope should not be used in daylight, on the surface, except special circumstances (for example, in remote sea areas; also as under No. 24). It is the raised periscope on the surface that makes the typical submarine silhouette. Similarly, on submerging in daylight, the periscope should not be raised until the submarine is well below the surface. In the same way, the submarine should not surface during the day, before the periscope has been lowered.

24.) If, for urgent reasons, such as overhauling, it should become imperatively necessary to raise the periscope by day when the submarine is on the surface, the additional height of the raised periscope can be used in suitable weather to send up a look-out with binoculars, provided that surprise attacks by hostile airplanes are not to be anticipated. If the weather clear and the sea calm, advantage can be taken of the raising of the periscope, for an all-round view. On account of the relatively week magnification of the periscope, however, and of the almost inevitable vibrations and movement of the vessel, this seldom serves a useful purpose. The danger of betraying oneself by the raised periscope is greater."

The Type IID can easily give the false impression of a raised periscope, as the housing is quite high as compared to other types.

09-01-10, 11:48 PM	#6
Snestorm Stowaway Posts: n/a Downloads: Uploads:	Here is what The Uboat Commander's Handbook has to say about raised periscopes.: "23.) The periscope should not be used in daylight, on the surface, except special circumstances (for example, in remote sea areas; also as under No. 24). It is the raised periscope on the surface that makes the typical submarine silhouette. Similarly, on submerging in daylight, the periscope should not be raised until the submarine is well below the surface. In the same way, the submarine should not surface during the day, before the periscope has been lowered. 24.) If, for urgent reasons, such as overhauling, it should become imperatively necessary to raise the periscope by day when the submarine is on the surface, the additional height of the raised periscope can be used in suitable weather to send up a look-out with binoculars, provided that surprise attacks by hostile airplanes are not to be anticipated. If the weather clear and the sea calm, advantage can be taken of the raising of the periscope, for an all-round view. On account of the relatively week magnification of the periscope, however, and of the almost inevitable vibrations and movement of the vessel, this seldom serves a useful purpose. The danger of betraying oneself by the raised periscope is greater." The Type IID can easily give the false impression of a raised periscope, as the housing is quite high as compared to other types.