SSR

When Mode C is selected on the aircraft SSR transponder the additional information transmitted is:

• AAltitude based on regional QNH.
• BAircraft height based on sub-scale setting.
• CHeight based on QFE.
• DFlight level based on 1013.25 hPa.

The ground Secondary Surveillance Radar (SSR) equipment incorporates a transmitter and receiver respectively operating in the following frequencies? Transmitter Receiver?

• A1090 MHz 1030 MHz.
• B1030 MHz 1090 MHz.
• C1090 MHz 1090 MHz.
• D1030 MHz 1030 MHz.

Why is a secondary radar display screen free of storm clutter?

• AThe principle of 'echo' return is not used in secondary radar
• BThe frequencies employed are too high to give returns from moisture sources.
• CA moving target indicator facility suppresses the display of static or near static returns.
• DThe frequencies employed are too low to give returns from moisture sources.