operation. For example, the computer may cue the operator to turn on the bomb bay door switch and the master arm switch. The P-C3 computer also uses the ordnance panel to instruct the ordnance crew member on how to perform certain pressurized SLT loading or unloading operations (exchange between storage rack and SLTs). This enables the ordnance crew member to make available the search store requested by the TACCO. 5. Present the operator with alternatives for which decisions are required; for example, arming has three selections (nose, tail, or both). The computer also furnishes alerts, such as components or circuit failures and selections errors, to bring important developments to the operator’s attention. 6. Calculate and initiate fly-to-point store releases, intervals between releases for train releases, and furnish system release commands in response to crew member release commands. 7. Secure the system following each weapon release, check store-in-place status, update the inventory, and prepare the system for the next store selection. MANUAL MODE.— In the P-C3, the manual mode provides the TACCO with management control of all kill and search stores. In the S-3A, each crew member controls kill and search stores under the management of the pilot and TACCO conjunctival y. In the manual mode, the P-C3 TACCO/S-3A pilot selects the bomb bay or wing station for release, along with the arming and release mode of the selected store. These actions are executed by the control on the weapons control panel. If required, the pilot is cued to turn on the master arm switch and open the bomb bay doors. When the station, arming, and release modes in the P-C3 have been selected, the master arm power will be on, the bomb bay doors will open (if required), and the kill ready lights on the ACP and TACCO manual weapons control panel will illuminate. If the selected station is loaded, the station select keys on the ACP will light amber (S-3A). The store may then be released by the pilot, copilot, or TACCO (also the SENSO in the S-3A) by use of their release switches. The P-C3 search store release and control in the manual mode is completed by the ordnance crew member using the controls on the search stores interconnection box. The desired SLT is selected by using the letter and number switches. This cues the pilot to turn on the search power switch. When the SLT has been selected and search power is on, a launch is effected by actuating the sono launch switch on the search stores interconnection box. Jettison Store jettison of both aircraft is somewhat similar in operation and control. Manual actuation of the jettison or the external jettison switch by the pilot disables the arming circuit and initiates jettison. In the P-C3, the jettison programmer is energized and sends sequential release and bomb bay door open/close signals. Wing stations are released in pairs (one from each wing) from outboard stations to inboard stations at 2-second intervals. At this same time, the bomb bay doors are opening. Then, the lower stations are released, the upper stations release after the lower stations, and then the doors are closed. A separate switch on the pilot’s console initiates the jettison function for wing stations only. Selective jettison from any station may be accomplished through normal manual release with the arming select (TACCO weapons panel) set on safe. In the S-3A, the wings and SLTs receive jettison commands from the wing and search store decoders to release all wing stores and 59 SLTs. The SAR chute remains loaded. Bomb bay stores, wing stores only, and wing stores from auxiliary devices (such as flare launchers) are released by using the ACP AUX rotary switch. This is done according to the load to be jettisoned. In this situation, the mechanical arm thumb-wheel selector must be set to safe, and the arm set switch depressed. Armed store releases may also be initiated in the above reamer. When the aircraft is on the ground, the jettison circuits of both aircraft are disabled by the weight-on-wheels switches. These switches are located on the right and left main landing gear (main mounts). 7-20