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2. RADAR OPERATION
2-27
2.26.1 Activating/deactivating ARP, TTM
1. Press the MENU key followed by the ARP SETUP soft key to show the ARP SETUP
menu.
EDIT
RETURN
ARP
SETUP
ARP TARGET INFO INTERNAL ARP
CANCEL ALL TARGETS NO
ARP VECTOR MODE TRUE
ARP VECTOR TIME 30 minutes
HISTORY INTERVAL OFF
CPA OFF
TCPA 30 seconds
AUTO ACQUISITION AREA OFF
TARGET ID NUMBER OFF
ARP setup menu
2. Select ARP TARGET INFO, then press the EDIT soft key to show the ARP TARGET
INFO window.
ARP TARGET INFO
▲
{
{
▼
~
INTERNAL ARP
EXTERNAL ARP
OFF
ARP TARGET INFO window
3. Select INTERNAL ARP, EXTERNAL ARP or OFF as appropriate.
INTERNAL ARP: The radar source must be an ARP-equipped Model 18x4/19x4 series
NavNet radar. Select this item also for a NavNet unit being fed ARP targets.
EXTERNAL ARP: Receive TTM data sentence via NMEA or NETWORK port. Target
tracks are shown but targets cannot be acquired.
OFF: Turns off the ARP or TTM display.
4. Press the ENTER soft key.
5. Press the MENU key to close the menu.
2.26.2 Acquiring and tracking targets (ARP)
Ten targets may be acquired and tracked manually and automatically. When you attempt to
acquire an 11th target, the message “ARP FULL – ALREADY TRACKING 10 TARGETS!”
appears for five seconds. To acquire another target, terminate tracking of an unnecessary
target as shown in the paragraph “2.26.4 Terminating tracking of ARP targets.”
Manual acquisition
When the automatic acquisition (AUTO ACQ. AREA) is set to on, up to five targets may be
acquired manually. If you attempt to acquire a sixth target, the alert message appears.
1. If not already shown, press the HIDE/SHOW key to show the radar soft keys.