 The 689th Radar Squadron was originally assigned to the SAGE Portland Air Defense Sector (PoADS) at Adair Air Force Station, Oregon, a part of the 25th Air Division SAGE at McChord AFB, Washington.Higher headquarters included 4th Air Force (Hamilton AFB, California), and Air Defense Command (Peterson AFB, Colorado).As the northernmost LRR site in PoADS, the 689th was also able to feed its radar data to the Seattle Air Defense Sector (SeADS), another adjacent unit of the 25th Air Division.