EDA Vertical Advisories This diagram shows a side view of an aircraft. A solid line, representing the nominal descent profile, extends from the aircraft down to the meter fix. A dotted line, consisting of three segments, represents EDA's suggested descent profile. The first segment extends horizontally from the aircraft to the Top of Descent (TOD) point. The second segment extends down from the TOD to a second point. This segment is labelled, "Descent Mach." The final segment extends from the second point to the Meter Fix. This segment is labelled, "Descent CAS."