Ekranoplane radars

Not too sure whether this should have been in the Naval thread 🙂 , but:

The Orlyonok transport ekranoplane has a navigation radar on aft the gun turret, any ideas on what model of radar this was?
http://www.samolet.co.uk/orlyonok.html

Likewise the Loon has a navigation radar in the nose and a surface search and air search radar, along with ESM in the tail. Any ideas on what radars, ESM are fitted?
http://www.se-technology.com/wig/html/main.php?open=showpic&code=&pic=406