[Milsurplus] boatanchor Navy radio control

[Nick England]

Navy aircraft radio control box for auction
says CAY-23220??

In case you missed it - since it is listed under "Other Boat Parts"
you know where, item 370071150167 

Will one of you knowledgable guys at least take a peek and let us know what
it was used for? I am puzzled by the dome-shaped thingy in the middle.

cheers,
Nick
No connection to seller, reality, etc.