"Grumman-581" wrote

"Wolfie" wrote ...

The Indianapolis was a CA, not a CV, and certainly not a CVN. ;p
(CA is a cruiser designation. CVs are carriers, with CVN being
the designation for a nuclear-propulsion carrier.)

There also was the CVA (USS America)...

Well, not "the" but, yes, CVA was also used for carriers. It replaced
both CV (aircraft carrier) and CVB (aircraft carrier, large) designations.
Later the Navy returned to CV (and CVN) instead of the CVA and
CVAN designations as the light (CVL) and support (CVS) carriers
were retired from the force structure.

Carrier designations:
ACV, AVG, AVT, CV, CVA, CVAN, CVB, CVE, CVGH, CVH,
CVL, CVN, CVS, and CVV. Some ships had multiple designations
as the Navy changed designations to match the force structure.