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messages, as evidenced by the advisory ATH
The ATHS provides the capability to maintain current MESSAGE RECEIVED, if appropriate, or the page
which was last displayed during a previous operation.
mission status for up to eight active airborne fire
Pressing the ATHS switch a second time displays the
missions, two active artillery fire missions, and two ATHS Top Menu page. The line address keys on either
preplanned artillery fire missions. The unit retains all side of the MFD are used to activate step to subpages
mission essential data in nonvolatile storage and can or change a field of information. The fifth key on the
store up to 12 previously received messages for later right side (SEND) transmits the displayed information
recall. The system also provides the capability to over the selected radio to a similarly equipped
request and execute airborne fire missions specifying receiving vehicle. When manual entry of information is
either HELLFIRE or standard ordnance and request required, an arrow will appear which points away from
and provide the required coordination to execute a the associated line key to signify that operator input
remote HELLFIRE mission. The aircrew can also must be made using the MFK (the ENTER key is not
request and execute artillery fire missions as Forward required). If only limited choices are available and rapid
Artillery Aerial Observer (FAAO); transmit spot selectivity is required, an arrow will be present beside
situation, battle damage assessments, and casualty the key field of information pointing upward. Pressing
reports. Team leader capabilities allow for receiving this line key will scroll through each available option.
and handing over fire requests to the best weapon Advisories will display in the caution/advisory block
when a message has been received (ATH MESSAGE
systems available to execute the mission; commanding
RECEIVED), when the ATHS has failed (ATH FAIL),
of team/unit movement with preset parameters; and when either of the authentication tables has less
retention of lists of preplanned battle positions, FARP than 20 available lines remaining (ATH TABLE LOW).
locations, etc., for later review or transmission; and For functions and descriptions of ATHS Top Menu
maintenance of current position, weapon status, and page, see fig 4-68.
aircraft status of all team members.
4-93. START PAGES  DESCRIPTION.
4-91. PHYSICAL DESCRIPTION. The Start pages are used to initialize the ATHS for later
use. The pages maintain the files for communication,
location, GO/NO GO test, time, and authentication.
The ATHS is composed of a single line replaceable unit
Communication subscriber identifiers are entered as
(LRU) that receives information from the mast mounted ORIGIN (ORIG), TEAM (TM), and BROADCAST (BC).
sight (MMS), CPG multifunction display (MFD), Additionally, a ZEROIZE key is provided in the Start
multifunction keyboard (MFK), and other sensors. The pages. This ZEROIZE key clears all data and table
processed information is displayed on the CPG MFD. entries from ATHS. Also included in these pages are
ATHS information is transmitted to, and received from, the six message presets, the six movement presets,
other ATHS equipped vehicles and the artillery and the bulk data load.
TACFIRE/FIST system using onboard radios. The
ATHS is not a transmitter, but supplies a signal to a
selectable radio and sends digital data as though it 4-94. START PAGES  OPERATION.
were voice. Traffic can also be passed to, and received a. Start Page 1/2. There are several fields
from, handheld data message devices (DMD’s). This requiring entries on this page: ORIG, TEAM, AND BC.
system provides the a b i l i t y to format complex The originator (ORIG) is the aircraft/observer/crew
messages such as artillery fire requests, reports, subscriber identifier and is in the SOI. It is a one digit
emergency broadcasts, automatic reporting of status, identifier (any letter or number). The TEAM identifier is
movement commands, and general free text messages a single digit that defines the team of which the
with automatic or manual authentication. originator is a part. A team is a group of subscribers
4-121
TM 1-1520-248-10
having the same NET data and the same team number/ segment twice per SEND and can be used when
letter. A team can be as few aircraft as two, the team atmospheric conditions or reception are poor.
leader and another digital communication type aircraft,
or a team could be platoon or company size. Several (c) BAUD Rate Selection.  Select between
messages are automatically addressed to the team and transmission rates of data bits (BAUD rate). Range: 75
allow the team leader to effectively control his TEAM. bits per second (bps)  very slow; 150 bps; 300 bps;
　
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