Is there a mod that tones down destroyer effectiveness

[Akula]

I am using GWX 3 and was if there is a mod that can town down the destroyer effectivness a bit...

My periscope gets detected from myles away (that due to radar?)

I am in the middle of a convoy and en early war escort is giving me a terrible time by knowing exactly what I am doing and where I am..

I am not sure if I am just not borne to be a Uboat skipper but seriously.

So, is there a mod that is compatible with GWX3 that can town down destroyers visual and detection capabilities, and that of Merchants?

Thanks,
G