New Catalina 30 mystery cover

[Scarecrw]

I purchased an 84 cat30 and it came full of bags of stuff. 104”x104” center D ring. Can someone tell me what this is used for

 

[jeepbluetj]

Boom tent? (for shade at an anchorage)

 

[Dave Groshong]

I agree with JeepBlueTJ, it's gotta be a boom tent awning/cover/shade of some sort, that size, and the grommets are likely to connect a halyard and peak it up.