This page explains how Terence Drassal (USATT# 64453)'s rating went from 1953 to 1951 at the Air Traffic Spring Open held on - 2 Apr 2000. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.