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Block IV

Block IV Terms and Definitions

Air Refueling Time Planned lapsed time from air refueling contact time (ARCT) to drop off
Anchor A defined area encompassing both a racetrack shape aerial refueling track and its protected airspace
Air Refueling Control Time (ARCT) The planned time that the receiver and the tanker will arrive over the ARCP
Air Refueling Initial Point (ARIP) The planned point to enter the refueling track (AC point)
ARCP geographical point over which the receiver arrives (AC point)
Air Refueling Track Designated flight route for the rendezvous; the tanker and receiver will hook-up at one end of the track and refuel along the route
Boom Frequency The frequency used between the receiver and the boom operator during the rendezvous; usually, this frequency is assigned as a primary with backup
Breakaway Tanker or receiver call indicating immediate vertical and nose/tail separation between tanker and receiver is required
Cell Two or more tankers flying in formation
Emission Control (EMCON) A means of reducing the amount of information passed to unauthorized listeners during a tanker rendezvous; found in ATO if other than 2
EMCON 1 (Normal Communication) Any and all emitters are authorized to ensure timely training or feedback and maximum safety
EMCON 2 (Restricted Communication) The standard option for daily refueling operations; requires radio silence except for two exchanges during rendezvous and refueling, confirming callsigns, timing, altitude and weapons safety check complete
EMCON 3 (Communications Out) All operations, including the rendezvous and refueling, will be conducted with radio silence; this option is for exercises and operational sorties only
EMCON 4 (Emission Out) No emitters will be used unless authorized by OPLAN; this option will not be used unless tasked by numbered Air Force or higher headquarters
Forward Range Term used to express the distance measured forward from the receiver to a line along the perpendicular axis of the tanker, as the tanker passes through the 3-9 line of the receiver; used to determine if corrections are required to complete the rollout
Offload Total fuel available on the tanker for transfer
Offset The lateral displacement between a receiver's and a tanker's track during a rendezvous; it is based on the tanker's turn in diameter, which is based on the tanker's speed, altitude and bank angle
Onload Amount of the fuel requested for transfer to the receiver
Overrun A situation where the receiver rolls out ahead of the tanker after the final turn
Refueling Altitude Altitude at which the rendezvous will be conducted
S-Turns A corrective action for a rendezvous where the receiver ends up too far behind the tanker; the tanker executes a series of slow turns away from and back to the refueling track to allow the receiver to catch up
Slant Range The distance from the receiver to the tanker measured along the line-of-bearing from the receiver to the tnaker
Weapons Safe Aircrew has placed all ordnance in 'safe' mode to prevent unintentional release
AOCP (Airborne Operational Computer Program) Basic operating system for the IBM 4pie computer
BMU (Bubble Memory Unit) Non-volatile bulk storage for data
CAF (Convert Adaptation Function) CAF data includes information such as airbase locations, restricted areas, restricted areas, air routes and other background information (excluding the map)
CAU (Computer Arithmetic Unit) Like the CPU for a PC; actually performs the computer functions, executing program instructions and performing calculations
CCCS origins (Command and Control Coordinate System Origin Points) These are the reference points used internally by the computer to calculate locations and time/speed/distance problems. Practice has shown that selecting a CCCS Origin within 250 nm of the E-3's area of responsibility improves the accuracy of calculations
Confidence testing Online testing performed during AOCP operation to identify and isolate data failures between the Data Processing System and other mission systems (radar, IFF, navigation, ESMS, and JTIDS)
Cyclic When the AOCP is operational, it is said to be "cyclic" because it operates in cycles and sub-cycles
Data Destruct There are two data destruct switches at seat 13
DAPG (Data Analysis and Program Group) Causes the BMU's and MMU's to overwrite all sectors and locations, thereby removing all mission data (Data Destruction Switch)
ESMG (Electronic Support Measures Group) Power is removed from the interface unit and the computer processor, which results in the destruction of all data (Data Destruction Switch)
DDS (Data Display System) Provides the visual display of a situation data such as tracks, sensors, backgrounds landmarks, etc.to the SDCs
DPS ( Data Processing System) This system performs the computational task s for the onboard command, control, and communications operations, generates Coordinated Universal Time and provides fault detection and isolation capabilities for interfacing mission avionics
DIODT (Write Override Data This term, pronounced "Die-odie" is an anachronism from when this data was recorded on tape (Drum Initialized Override Data Tape). It is essentially a snapshot of operator-entered data that is saved for missions that are going to be repeated in the same a
DMP (Diagnostic Maintenance Program) Routine run by the CDMT at the end of a mission to isolate any faults or confirm system readiness for the next mission
DPDS (Data Processing and Display System) The entire computer and display system
Grid Map A generic map that can be used in any region of the world, consisting of evenly spaced horizontal and vertical lines, Normally used when the E-3 is transiting to a deployed locations or distant area of responsibility when the map displays are not needed
IPL (Initial Program Load) The process of loading the AOCP into the memory There are two types
RMA IPL Normally performed after the initial power-up, this loads the program from the RMA in the HDS in approximately 15-20 minutes
BMU-IPL Faster than an RMA IPL(Usually 15-20 deconds), this is a reload of the program from the BMU where it was stored during the original IPL
MMU (Monolithic Memory Unit) The main memory for the computer that consists of three identical solid state memory units each with 16. 64K sectors. Mass storage units used for dynamic programs and for file loading, both of which require large capacity and fast access. This is where AO
MSCP (Mission Simulator Computer Program) A modified version of AOCP that operates the mission simulators and takes into account the differences in hardware and interfacing systems between the simulator and the aircraft
OBTM&M (On Board Test Monitor and Maintenance) Pronounced "Oh-bit-em," it is a continuous testing system that tests all displays and the IFF every 13.33 seconds. This system is what allows the CDMT to know there's something wrong with your SDC even before you know it
Refresh Channel Interface between display processor and individual consoles
Restart When AOCP identifies failures within the DPS, it reconfigures to compensate and restarts itself
RMA (Removable Media Assembly) The data storage element in the Hard Disk Subsystem (HDS)
RSIP (Radar System Improvement Program) A recent update of the E-3's surveillance radar system that greatly improved its detection capabilities, especially for small cross-section and low velocity targets, and simplified its operation
Tinker Map Another generic map, this is an arrangement of "+" symbols evenly spaced over the screen and is only available when the CDMT doesn't select a map during IPL (the default map)
CCA/CCB Acts as a relay between the DMX and the input/output devices. (Computer Control)
Digital Multiplexers (DMXs) All input/output operations are executed through the two DXMs. An independent, stand-alone unit complete with the logical and storage capabilities necessary for control of the transfer of information among the CAU, memory units and input/output devices. (
Computer Arithmetic Units (CAUs) The two CAUs are the actual computing elements of the 4pie DPS. They execute the program instructions and perform arithmetic calculations.
Created by: jsc265