Designed by Capt. Barry Schiff, APR’s Quick-Learn Holding Pattern Computer helps you to easily visualize how to enter all Standard and Non-Standard Holding Patterns. By setting the inbound holding course you can immediately read all headings and courses.This pocket-size Holding Pattern Computer also shows a pictorial flight path for all holding procedures and provides specific directions for entering any holding pattern.Maximum indicated holding speeds & inbound times are provided on the bottom panel of the computer. Constructed with hi-stress durable plastic.Dimension: 3-5/8" x 5-5/8"