Mod request: Rangefinder scope on Deckgun

[Generalee]

Hello, I have been playing silent hunter 4 since the beginning of the weekend , and I have downloaded a few mods, like the Bismarck surface vessel battleship and the yamato. Until recently, I have not seen any combat fleets, and when I seen one, I got half destroyed, and got next to no hits with the main deckgun... I would like to know if there is a mod anywhere on the internet that has a scope on the deckgun that tells you range, and if so, I would like the link.

ps: I would also be interested in surface vessels mod links...

Thanks Ahead of time

Generalee