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transmit to original sender with tables status of the message. If the message has been
synchronized. reviewed, delete (DEL) will appear next to the right
hand key line; if not yet reviewed, NEW will appear.
4-205. CANCEL CHECKFIRE MESSAGE Another function of the received messages is that it allows the observer to leave the IDM pages and still be
TRANSMISSION. able to manage a fire mission. The Fire Mission
To broadcast a cancel checkfire message, proceed as Summary pages will be automatically updated upon the
follows: receipt of new mission commands. Received free text
and movement messages can be deleted on the page
1. IDM switch  Press as required to display that they are reviewed. If delete is selected, the system
IDM Index page. will return to the Received Message Index page.
Situation/status reports are automatically deleted after
2. MSGS/FTXT key  Press. they have been reviewed and the information is stored
in the Status pages.
3. CANCKF key  Press.
4-207. REVIEWING RECEIVED MESSAGE
4. DEST− key  Press. Enter identifier of subscriber as desired. INDEX.
To review a received message, proceed as follows:
5. SEND key  Press.
1. IDM switch  Press as required to display
6. To return to IDM Index page, IDM switch  IDM Index page.
Press.
2. RCVD MSG  Press to display received
4-206. RECEIVED MESSAGES. message index.
The received message function of the IDM allows the 3. Message to be reviewed  Select by
observer to access the received message list to review pressing key adjacent to appropriate
new messages. It also allows the observer to review message number.
and delete any previously received messages, to
include received fire requests. When an IDM message 4. Delete message as appropriate.
4-208
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JVMF Message List
Situation Input Processing
Name Supported (Rcvd Msgs Only) Notes
System Coordinated Msg BSA registration N/A No CDS interface,
automatically generated by
IDM
Free Text C2 and FS Manual Transmit/Receive
Info Request Message C2 Manual Transmit/Receive
Check Fire FS N/A Transmit only
Call for Fire FS N/A Transmit only
Observer Mission Update FS N/A Receive only
On-Call Fire Command FS N/A Transmit only
MTO FS Auto Receive only
EOM&S FS N/A Transmit only
Subsequent Adjust FS Auto Transmit/Receive
Observer Readiness C2 and FS N/A Transmit only
Airborne Fire Mission FS Auto Transmit/Receive
SPOT Report C2 Manual Transmit/Receive
Position Report C2 Auto Transmit/Receive
SITREP C2 Auto Transmit/Receive
Orders (FRAGO) C2 Manual Receive/Forward
Note: Messages listed as Auto, under Input Processing, are automatically obtained from the IDM.
4-208. JOINT VARIABLE MESSAGE FORMAT a. Threads. Threads are grouped by functionality,
(JVMF). e.g., INITIALIZATION, START, C2 MESSAGES, etc.
The following is a list of JVMF threads that are
addressed:
4-209. OVERVIEW.
The JVMF functionality is accessed through HOG INITIALIZATION
function and associated displays (screens). HOG START
screens shown contain both italicized and non-italicized
SHUTDOWN
text. Italicized text represents data taken from one of
the loaded databases. Non-italicized text represents C2 MSGS
text that is hard-coded in the software as part of the FIRE MISSIONS
display page. In support of CDS4 Phase 1, a total of 16
messages are provided. Together IDM and HOG COMM FUNC
capabilities provide digital capability to transmit and/or OTHER FUNC
receive these messages (refer to JVMF message list). SEND
JVMF displays support three situations:
INBOX
Battlefield Situational Awareness (BSA). ACKS
Command and Control (C2). SA FUNCTIONS/DATA
Fire Support (FS). MESSAGE DEFAULTS
JVMF functionality is divided into threads and display
pages. Additionally, several advisories are provided to b. Pop-up Displays. Pop-up displays are HOG
increase crew awareness of situation changes. menus overlaid on all MFD screen displays (fig. 4-87).
4-209
TM 1-1520-248-10
e. MMS Display Data. The following is a list of
MMS data that can be displayed on the JVMF display
pages:
MMS Rotary Advisories.
MMS Line of Sight.
MMS Mode Status.
TV/TIS Zoom Level.
MMS Azimuth and Elevation Display.
Heading Tape.
Lubber Line.
Bearing-to-Waypoint Arrow.
MMS Azimuth Indicator.
MMS Video.
Laser Armed Status.
Laser Range.
MMS Laser Range Designator.
4-210. START THREAD.
The START menu provides primary user interface to
t h e JVMF messaging system f o l l o w i n g IDM
　
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