I suspect that the name Cougar might relate more to the name of the manufacturer of this Rigid inflatable seen crossing the Solent, Southampton in May 2017. Unfortunately I could not see any other identifying marks on her hull
Author: John Leary
Photo size: 2.7 Mpixels (7.63 MB uncompressed) - 2000x1333 pixels (6.7x4.4 in / 16.9x11.3 cm at 300 ppi)