part of autophagosome membrane docking The initial attachment of an autophagosome membrane to a target membrane, mediated by proteins protruding from the membrane of the vesicle and the target membrane. Docking requires only that the two membranes come close enough for these proteins to interact and adhere. GO:0016240 biological_process autophagic vacuole docking autophagosome maturation organelle localization by membrane tethering