(Cont)
MNEMONIC INTERPRETATION
STD Standard
STEEL Steel  Construction Material
SUB Subscriber
SUBQ ADJ Subsequent Adjustment
T Test
T/D Type of Data
TFR TACFIRE
TGT Target
TGT NO Target Number
TIME Time (Hours and Minutes)
TIME FLT Time of Flight
TIME RPT Time Report
TNO Try Number
TOT Time on Target
TRILAT Trilateration
TROOPS Troops
TRP & ARM Troops and Armor
TRP MECH Troops Mechanized
TRP & VEH Troops and Vehicles
TYPE REG Type of Registration
U/D Up/Down (In Meters)
UNK Unknown
UP UP  Changes in Height of Bursts
USE GT Use Gun Target Line
VA Vertical Angle
VA ERR Vertical Angle Error (In Mils)
4-149
TM 1-1520-248-10
(Cont)
MNEMONIC INTERPRETATION
VCORR Vertical Correction
VEH Vehicle
VEH PON Vehicle Pontoon
VERY HVY Very Heavy
WKPTY Work Party
WOODEN Wooden Construction Material
WP/DELAY White Phosphorus With Delay Fuze
WPN Weapon(s)
WP/Q White Phosphorus with Quick Fuze
WP/TI White Phosphorus with Time Fuze
WR/AF When Ready/Adjust Fire
WR/FFE When Ready/Fire For Effect
WR/RFFE When Ready/Repeat For Fire Effect
XMIT BLK Transmit Block
XMIT RATE Transmit Rate
YES Affirmative
4-150
TM 1-1520-248-10
SECTION V. (CDS3) IMPROVED DATA MODEM (IDM)
4-126. GENERAL. as evidenced by a received message advisory, if
appropriate, or the page which was last displayed
during a previous operation. Pressing the IDM switch a
4-127. IDM MISSION CAPABILITIES. second time displays the IDM Index page. The line
address keys on either side of the MFD are used to
The IDM provides the capability to maintain current activate step to subpages or change a field of
mission status for up to eight active airborne fire information. When manual entry of information is
missions, two active artillery fire missions, and two required, an arrow will appear which points away from
preplanned artillery fire missions. The unit retains all the associated line key to signify that operator input
mission essential data in nonvolatile storage and can must be made using the MFK (the ENTER key is not
store up to 12 previously received messages for later required). If only limited choices are available and rapid
recall. The system also provides the capability to selectivity is required, an arrow will be present beside
request and execute airborne fire missions specifying the key field of information pointing upward. Pressing
either HELLFIRE or standard ordnance and request this line key will scroll through each available option.
and provide the required coordination to execute a Advisories will display in the caution/advisory block
remote HELLFIRE mission. The aircrew can also when a message has been received, when the IDM has
request and execute artillery fire missions as Forward failed (IDM FAIL), and when either of the authentication
Artillery Aerial Observer (FAAO); transmit spot tables has less than 20 available lines remaining
situation, battle damage assessments, and casualty (LOW). For functions and descriptions of IDM Index
reports. Team leader capabilities allow for receiving page, see fig 4-78.
and handing over fire requests to the best weapon
systems available to execute the mission; commanding
of team/unit movement with preset parameters; 4-130. RAPID FUNCTION. Rapid at L-5 appears
retention of lists of preplanned battle positions, FARP on every page of IDM. The RAPID function provides
locations, etc., for later review or transmission; and direct access to any one of the following f i v e
maintenance of current position, weapon status, and operational IDM pages.
aircraft status of all team members.
Summary Page of Highest Priority Received
Message
4-128. PHYSICAL DESCRIPTION. Airborne Mission Summary Page
The IDM is composed of a single line replaceable unit Artillery Mission Summary Page
(LRU) that receives information from the mast mounted Mayday Message Summary Page
sight (MMS), CPG multifunction display (MFD), Quick Menu Page.
multifunction keyboard (MFK), and other sensors. The
processed information is displayed on the CPO MFD. 4-131. START PAGES  DESCRIPTION.
IDM information is transmitted to, and received from,
other IDM equipped vehicles and the artillery TACFIRE/ The Start pages are used to initialize the IDM for later
FIST system using onboard radios. The IDM is not a use. The pages maintain the files for communication,
transmitter, but supplies a signal to a selectable radio location, GO/NO GO test, time, and authentication.
and sends digital data as though it were voice. Traffic Communication subscriber identifiers are entered as
　
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