This International Standard specifies terms and definitions relating to dred­gers, with the aim of giving clear enough defini­tions for every term for them to be under­stood by all special­ists. It applies only to equipment which is used for the creation and mainten­ance of navi­gable waterways and the extraction of soil. The terms specified in this Inter­na­tional Standard are intended to be used in do­cumentation of all kinds. Use of syn­onyms for the standar­dized terms, which are generally not included in this Stan­dard, is not recommended. Certain stan­dardized terms are also given with their abridged version: these may be used in cases where no possibility of mis­inter­pretation can arise. Combination of terms are allowed in ap­plication. In cases when a definition contains a term defined elsewhere in the Stan­dard, the corresponding item number follows in brackets.