chapter  22
4 System operation
Pages 6

Figure 22.8(b) ATC/TCAS control panel

for detailed ATC operation.) The mode select

switch is used to disable TCAS surveillance,

enable traffic advisories only, or both traffic and

resolution advisories. With the system in standby,

the TCAS transponder is powered but it will not

interrogate or reply to interrogations; all

surveillance and tracking functions are disabled.