ASA Holding Pattern Computer – ASA’s new design for the Holding Pattern Computer not only shows pilots which entry is appropriate given the assigned holding radial for both standard and nonstandard patterns (direct, parallel, or teardrop), but it also depicts how pilots get to this entry, given their current heading. A perfect learning tool for experienced instrument pilots, students, as well as a convenient instructional aid for flight instructors. Made of durable plastic. 5″ x 3-1/2″.