Gulfstream HALO I Air Refuelers This patch came into use

This patch came into use in 1951

lower basic but increased max takeoff weights

Requires minor assembly (torpedo)

About the same time

Gulfstream HALO I Air Refuelers This patch came into useHALO Gulfstream airplane model. The High ALtitude Observatory (HALO), is an instrumented Gulfstream IIb twin engine jet aircraft maintained by the United States Army Space and Strategic Defense Command as an optical data collection platform. Capable of operating above 50,000 feet, the HALO's diverse and flexible sensor suite has provided infrared, optical and ultraviolet data on numerous SDIO, NASA and DOD test programs. The HALO contains three