Looking for information about radar / sonar on early Cold War Soviet submarines

[TheGeoff]

As some of you may know, I'm in the process of developing a simulator focusing on the Foxtrot-class submarine (not Sub Commander - a new sim). These submarines played a pivotal role in the Cuban Missile Crisis and were active throughout much of the Cold War.

In order to make the simulator as realistic as possible, I am looking for any photographs, documents, books, documentaries etc. relating to the equipment used on these submarines. If you can think of any sources which might be helpful, please post them! I have been searching for months but information on the radar, sonar and ESM suite are particularly hard to come by - apart from occasional museum photos and passing references in databases there is very little information online.

The pieces of equipment I am especially interested in are:

• Флаг (Flag) radar systems (NATO designations: 'Snoop Tray' or 'Snoop Plate')
• Накат (Rebound?) ESM system (NATO designation: 'Stop Light B')
• ХРОМ-К (Chrome-K) direction finder / navigation radar (NATO designation: 'Quad Loop')
• МГ-10 Кола / МГ-10M Феникс-М (Cola / Phoenix-M) sonar system (NATO designation: 'Trout Cheek'?)
• МГ-200 Арктика-М (Arctic-M) sonar system (NATO designation: 'Pike Jaw'?)
• МГ-15 Свияга (Sviyaga) sonar system
• МГ-13М Свет-М (Light-M) sonar detector(?)
• Ива-МВ (Willow-MB) HF radio

Does anyone know where I could find photos, documents, or books which cover these or any other Soviet sensors in detail? Any good books about Soviet subs in general?

I appreciate any recommendations!