The silver metal star devices were sometimes replaced by embroidered silver stars, as can be seen on this patch that depicts either 7,000 hours of flying time or, for Missile Combat Crew Members–Airborne, a tally of 400 alerts. Week-long alerts, which were typical for aircrews, were counted as seven alerts by missileers because the typical underground missile alert at the time was a 24-hour period, or one day, and if foul weather resulted in a 48-hour alert, it was counted as two alerts, even though it had been “signed for” only once. NOTE: To denote alert totals, metal stars were also added to the Missile Crew SAC Warrior patch, which is covered in the MAJCOMs album in the Higher Headquarters section because it was worn without any stars by those who did not yet qualify for one–and it was not initially intended primarily as an alerts tally patch.