 Following Desert Storm, F-14As and F-14Bs underwent upgrades to avionics and cockpit displays to enable the use of precision munitions, enhance defensive systems, and apply structural improvements.The new avionics were comparable with the F-14D; these upgraded aircraft were designated F-14A (Upgrade) and F-14B (Upgrade) respectively.By 1994, Grumman and the Navy were proposing ambitious plans for Tomcat upgrades to plug the gap between the retirement of the A-6 and the F/A-18E/F Super Hornet entering service.