This part of ISO 22369 specifies the drift classification procedure for field crop sprayers by field measurements of spray drift sedimentation in conformity with ISO 22866, including the test methods and evaluation criteria needed. It also allows the allocation of the spray drift reduction classes specified by ISO 22369-1. This part of ISO 22369 is intended to determine the drift reducing performance of field crop sprayers by comparison with a reference spraying system in order to rate (classify) the field crop sprayers. The application of this part of ISO 22369 can support advisory services for farmers, product development and legal certification and classification schemes. This part of ISO 22369 is intended to be used together with ISO 22369-1. This part of ISO 22369 is applicable to mounted, trailed and self-propelled field crop sprayers used in field crops.