Quote:
Hi Hitman,
do you have any sources for the max. speed the periscope could be used? And at what speeds it became useless? I ask because I could not find any real data and there is nothing mentioned in the original U-Boot Handbuch  Maybe it's not mentioned because no Kaleun would use it at such speeds because of the higher detection chance?
On a different subject: Can you confirm that the hydrophone could not be used when snorkeling? Do you know the max. sea state at which the snorkel could be used?
|
I have readed so many books and reports that it's difficult to remember the sources sometimes
Must double check, but IIRC the reference to maximal snorkelling speed comes from Clay Blair's book, and the reference to periscopes from "US submarines through 1945" by Norman Friedman, App. II (Periscopes). Friedman comments the several proposals received by the US Navy from different makers of periscopes and problems encountered, and comments that german subs also had problems when speeding up due to periscope vibrations. In the case of fleet boats this would be even worser, as they had quicker underwater speeds.