Furuno FCR-2807 Manual De Usuario

4. Tracked Target (TT) Operation 

The TT continuously monitors the predicted range at the Closest 
Point of Approach (CPA) and predicted time to CPA (TCPA) of 
each TT. When the predicted CPA of any TT becomes smaller 
than a preset CPA range and its predicted TCPA less than a 
preset TCPA limit, the audio alarm sounds and "TT dangerous 
target" appears (in red) in the Alert Box. In addition, the symbol 
of the offending TT is red and flashes together with its vector. 
 

This feature, when used correctly, helps prevent the risk of 
collision by alerting you to threatening targets. It is important 
that GAIN, A/C SEA, A/C RAIN and other radar controls are 
properly adjusted.  

CPA and TCPA settings must be set up properly taking into 
consideration the size, tonnage, speed, turning performance and 
other characteristics of own ship.  

To set the CPA and TCPA ranges, do the following: 

1.  Use the trackball to select "CPA" of "CPA Off" at the lower right corner. Push the left button to show the CPA 

and TCPA boxes. 

 

SINGLE

SINGLE

AUTO
MAN

AUTO
MAN

xx.xx xx.xx

xx.xx xx.xx

 

2.  Spin the scrollwheel to select the CPA setting desired (0.1-20 NM) then push the scrollwheel. 

3.  Use the trackball to select the TCPA setting. 

4.  Spin the scrollwheel to select TCPA value desired (1-60 min) then push the scrollwheel. 

The TT dangerous target alarm sounds when the CPA or TCPA of an target is within the set CPA/TCPA. To 
acknowledge and silence the alarm, push the ALARM ACK key on the keyboard, or select the ALARM ACK box 
with the trackball then push the left button. 

The warning label "TT dangerous target" and the flashing of the plotting symbol and vector remain in the Alert Box 
until the dangerous situation is gone or you intentionally terminate tracking of the target.