hello all

[Ronin1975]

Hi all, I'm new to this forum and I would like to start off with a few questions if I'm allowed:

First I playing Silent Hunter 4 with U-boat Missions (1.5)
And these are the Mods I'm using:
1) trigger maru Overhauled
2) RSRDC
3) ROW 3.3







here's my first question:
In my career it's jan. 15 1943 and I'm still on the Gato DRUM sub. After every patrol I can put another deckgun on my sub, or a new radar, etc But i have never had a conning tower upgrade.
I still have the one on the picture below:
This is the conning tower ingame:


But I really do NOT like that conning tower and i want to upgrade it. Like the tower in the picture below.


Can somebody tell me what I have to do to get the conning tower on the 2nd screen? What are the requirements to get a update? Do i have to have more reown? If there going to be an upgrade at all or am I stuck with thise one untill I'm offerd a new sub??

Question 2 is about RSRD:
I thought that there were also missions where you have to drop of a squad of commando's of spy's on enemy land. But the only missions I get are "go to an area and conduct anti-shipping."

Thanks for your time.