2nd Bn, 56th Arty, 1966-68 (Source: Richard Tracy) The interior of the AN/MSQ-18 Operations Central van, during a maintenance session. The two Surveillance and Entry Consoles, with their radar scopes and multiple readout/command/control panels, ten-button telephone switchboards, and trackballs are quite prominent. Also note the small white/yellow/red Air Raid Warning level lights behind the operator, the a/c panel, and clock. At upper right is the OC van's patchcord panel, for routing incoming/outgoing ADL/voice signals.