Strange Cushion Identification?

[atlantictopacific]

Does anyone know what this cushion is for?

I have a 2013 R31CB, and it came with the long, narrow cushion that I can't identify. It's the same color and style as the cushion that converts the table into a berth. The mystery cushion is slightly raised at one end, giving it a triangle shape. Doesn't seem to fit anywhere. Anyone recognize it?
Thanks!

 

[FlyMeAway]

It's the "lounger" cushion.

The outboard (farthest port), forward-facing seat in the salon can angle forward a bit. If you put the salon table down, you can use the weirdly shaped cushion to photographed to prop up your knees and "lounge." It *is* fairly comfortable, but it is also a bit of work...