WASHINGTON — The Navy’s new airborne jamming aircraft will be known officially as the EA-18G “Growler,” its informal moniker for the last several years, the Pentagon has announced. The designation comes two years after the Navy petitioned the Air Force Materiel Command, which assigns aircraft names and numbers for all the service branches, for the title. About 30 names, including “Shocker,” “Demon ” and “Gator,” also were considered, said Chuck Wagner, a spokesman for the Naval Air Systems Command. The plane, which is to enter service beginning in 2009, replaces the EA-6B “Prowler,” a Vietnam War-era workhorse that is being...