The Malabar Transmitter Annex is currently used as an auxiliary communications annex in support of space activities for NASA and the U.S. Space Force. The facility is under the control of the Space Launch Delta 45 as an annex of Patrick Space Force Base. The annex was originally established as a naval airfield in 1943. Located in the southwestern region of Brevard County, within what is now the city of Palm Bay, the airfield was originally constructed with four 4,000-foot runways. It was decommissioned as an active facility in the mid-1950s.