Vertical situational awareness is your responsibility. If the Ground Proximity Warning System alert sounds, you must be prepared to execute an immediate pull up. Except in clear daylight visual conditions, the flight crew should immediately, and without hesitating to evaluate the warning, execute the pull up action recommended in their company’s procedure manual. Remember that the need to pull up or go around may occur for reasons other than terrain, such as an unstabilized approach, a high sink rate, improper configuration or deteriorating environmental conditions. It can also be driven by an unintentional error on the part of a controller or with the approach procedure design or other factors. In other words, you may be doing everything right from your point of view, but you may still get a pull up warning. It must not be ignored. Early generation GPWS sometimes gave false warnings and some flight crews became accustomed to ignoring the warnings leading to numerous CFIT accidents. Today, GPWS is extremely reliable due to enhancements in technology and advanced systems such as the Enhanced GPWS and the Terrain Awareness Warning System (TAWS) are even better. False warnings are highly unlikely with these new systems. The Flight Safety Foundation supports installation and usage of the newest technologies such as EGPWS and recommends that your fleet be updated to this type of equipment. As a pilot you should ensure that your operations are conducted with the most current version of the software for the system you are using. GPWS is designed to assist you by giving you warnings. Cautions given by the system require you to adjust the flight path. GLIDESLOPE, GLIDESLOPE Glideslope and bank angle for example. For extreme conditions these systems give warnings that you must react to immediately such as: Whoop, Whoop, PULL UP, Whoop, Whoop, PULL UP, Whoop, Whoop, PULL UP SINK RATE, SINK RATE, SINK RATE, SINK RATE When warnings do sound, the pilot not flying must be involved and assist the pilot flying. We＇re not stabilized, shouldn＇t we go around? Go Around!3. What should the pilot do when GPWS is alerted?