tubby linton -
MyFCOM VOL1 states that the gain adjusts receiver sensitivity to enhance ground mapping in MAP mode only.
In FCOM Vol 2 it states that gain should always be left in automatic,unless specific display enhancement is deemed necessary.
The majority of my colleagues use manual gain outside the terminal area as the radar appears to understate the weather.
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Friend checking out on my equipment. Met him on the ramp. He warned about moderate to severe turbulence near top of descent.
Me - "Yeah, that's stuff been there for several days."
Him - "Our radar didn't show a thing."
Me - "What radar settings were you using?"
Him - "I started using my old a/c radar settings(manual gain/tilt settings) but the CKA(TRE) said "we don't run the radar that way".
Me - "I use the same techniques you mentioned. Your instructor flies the line twice a year. Trust me, most guys don't use the 'book' settings out here."
Caveat emptor