Small changes in an ADVM position can cause big problems with your index velocity rating. Changes in pitch and roll can change from poor mount design, broken mounts, debris snags, or ADVM installation error. When pitch and roll changes occur, a different sample volume is measured which can cause departures in your index velocity rating. ADVM movement could be difficult to catch, but reviewing ADVM data in the field can explain and potentially prevent rating issues. This talk will discuss how to identify rating problems caused by changes in pitch and roll along with best practices for shifting index velocity ratings due to pitch and roll.
