TCAS RA - preventive RA, basic question
Hello everyone
I understand MAINTAIN VERTICAL SPEED MAINTAIN , MONITOR VERTICAL SPEED are preventive RAs
My FCOM states this means Maintain the vertical speed indicated on the green area of the PFD and Ensure that the vertical speed remains outside the red area
respectively .
But I am not able to figure out the difference between these two and and in what conditions will these trigger , since one says maintain vertical speed on green area and other says maintain vertical speed outside the red area, which basically means the same
I appreciate you taking time to help me out with this
Thank you