Complex sentence: VF-31 (and VF-11) moved from NAS Oceana to NAS Miramar and to the USS "Carl Vinson", and exchanged its F-14As for the new and improved F-14Ds.
Split into simpler sentences: VF-31 (and VF-11) switched carriers, planes, and home bases at the same time. It moved from NAS Oceana to NAS Miramar and to the USS "Carl Vinson", and exchanged its F-14As for the new and improved F-14Ds.