This armor was in use until the introduction of Phase II armor in late 21 BBY. Phase I pilots also had a box attached to their chest armor that supplied oxygen to their helmets.

When Phase I armor was in use, ground and starfighter pilots wore armor that featured yellow markings and red Republic symbols on their specialized helmets. However, in space they discarded their bacta, ammo, and bolt casters for time bombs. Pilots also knew how to operate all military land vehicles such as the AT-TEs.These specialized troopers were normally equipped with a bolt caster, a blaster pistol, and a supply dispenser containing five packs of medicine, bacta, and ammunition. The pilots who flew capital ships wore a special type of armor instead of the regular one, seen in the First Battle of Mon Calamari, during the Clone Wars. In addition, they flew starfighters such as the V-19 Torrent, ARC-170, and Alpha-3 Nimbus-class V-wing. Pilots also operated CR20 and CR25 troop carriers. They first appeared at the Battle of Geonosis, where they flew LAAT/i and LAAT/c gunships. Clone trooper pilots were special clone troopers bred in the Kamino cloning centers for the purpose of piloting craft of the Grand Army of the Republic and the early Galactic Empire.

Phase 2 clone pilot