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5.15.6 Automatically acquired targets
The indication “AUTO TARGET FULL” appears at the screen center and a short beep tone
sounds when the number of automatically acquired targets reaches 20.
5.15.7 System failure alarm
When the ARP board receives no signal input from the radar or external equipment, the
screen shows both “SYSTEM FAIL” associated with an indication denoting offending equip-
ment, also releasing an aural alarm. The missing signals are denoted as shown below:
langiSgnissIMnoitacidnI
langisgoldeepS*GOL
ssapmoccitengamrossapmocoryg,langisgnidaeH*)MG(TGDH
radarmorflangisreggirTREGGIRT
radarmorfoediVOEDIV
annetnaradarmorflangisgniraeB*HTUMIZA
annetnaradarmorfeslupgnidaeH*GNIDAEH
*Alarm available with or without ARPA.
5.16 Trial Maneuver
Trial simulates the effect on all tracked targets against own ship’s maneuver without inter-
rupting the updating of target information.
There are two types of trial maneuvers: static and dynamic.
5.16.1 Dynamic trial maneuver
A dynamic trial maneuver displays predicted positions of the tracked targets and own ship.
You enter own ship’s intended speed and course with a certain “delay time.” Assuming
that all tracked targets maintain their present speeds and courses, the targets’ and own
ship’s future movements are simulated in one-second increments indicating their pre-
dicted positions in one-minute intervals as illustrated in Figure 5-13.
The delay time represents the time lag from the present time to the time when own ship
will actually start to change her speed and/or course. You should therefore take into con-
sideration own ship’s maneuvering characteristics such as rudder delay, turning delay and
acceleration delay. This is particularly important on large vessels.
In the example shown in Figure 5-13, own ship will advance straight ahead (even after a
maneuver) for a delay time of five minutes and then alters speed and course until opera-
tor-specified intended speed and course are achieved (position OS7 in this example).