
You can toggle between Phased and Active Sonar, with four range modes for 
each option. To toggle the Phased Sonar option, click on the "Phased" 
button or press lower case "p". To toggle the Active Sonar option, click 
on the "Active" button or press lower case "a". When either button is 
active, it will be highlighted in green. When either system is inactive, 
it will be highlighted in white. In addition, the numbers corresponding to
each system will be highlighted in green when you select a system. When 
neither system is activated, the numbers will be unlit. To scroll up 
through the numbers when a system is activated, press lower case "r"; to 
scroll down through the numbers, press upper case "R". The display range 
will be shown when you activate either the Phased or Active Sonar mode.

Range modes for different sonar systems. Range is in nautical miles (nm).

     System Range = 1    Range = 2   Range = 3    Range = 4

     Active 4            8           16           32

     Phased 1            2           4            8

