"Relative Virtual Addresses", relative to what?
RVA is the address relative to the image base address, after having been loaded into memory.
The MS PE/COFF specification says:
Relative virtual address. In an image file, the address of an item after it is loaded into memory, with the base address of the image file subtracted from it. The RVA of an item almost always differs from its position within the file on disk (file pointer).