Submarine Scopes - Can they always be deployed?

[KaleunMarco]

Originally Posted by Aktungbby

NO!...this has been discussed previously; the submerged speed for an extended periscpe needs to be 3 knots or less to prevent tube vibration. AND don't forget to drap your arm over the periscope hand for added steadiness https://www.subsim.com/radioroom//sh...d.php?t=201357 Also the other factor is going slow to reduce the scope's wake in the water to observant escort vessels : https://www.subsim.com/radioroom/sho...22&postcount=5 https://uboat.net/forums/read.php?20,64127,64136

fogging of the tubes......

i hate when my tubes get fogged.

[Aktungbby]

Originally Posted by KaleunMarco

fogging of the tubes......

i hate when my tubes get fogged.

Worse yet, after the advent of Liberator 10-centimeter radar equipped Coastal Command aircraft, being on the surface to recharge or surface-approach a target vessel was hazardous, a fogged scope would practically entail a return to base ending the war patrol. One little-discussed facet of the U-boat war is that the repair backlog at the bombproof bases was abysmal. This actually encouraged a scheme to create remotely flown explosive-laden B-24s into the concrete base bunkers to wreak damage on idle U-boats. One such experimental aircraft exploded prematurely before the pilots could bailout, killing Ambassador Joseph Kennedy's eldest son, Joe Jr., and paving the way for #2 son, John, stepping up to a career in politics after his PT 109 Navy Cross winning adventures in the Pacific.

[XenonSurf]

Thank you both very much for your extended feedbacks, very appreciated!


I had a discussion about this question on another forum and my close guess was that sailing at 2 knots with the scope deployed in rough conditions should be a safe limit - but probably a useless action as for what you could actually see with all the splashes. My recommendation in the game UBOAT was: Go deck awash to increase your sight range a bit at the risk to be spotted.


My best greetings to you
XS

[Aktungbby]

/\....you only do a 'decks awash' approach at night...and never with the moon behind you!

[Kapitan]

To quote perisher teacher Commodore Jim Perks "we don't go around waving masts around"

higher the speed more of a wake the scope will leave meaning more likely to be detected.

even back in WWII & WWI scopes and other masts had speed limitations and the same is true of today's boats.