Abstract: Methods and systems for automatically aligning an overhead hoist transport (OHT) vehicle with a load port of a wafer fabrication tool during operation and at the installation phase of the equipment in a semiconductor fabrication facility are described herein. In one aspect, an alignment frame including a digital image capture device is mounted to a wafer-in-progress (WIP) carrying pod. An image captured by the image capture device is analyzed to determine a positioning error of the OHT vehicle relative to the alignment frame based on the location of the OHT vehicle within the image. In another aspect, an inertial measurement device is coupled to a gripper assembly of an OHT vehicle. Inertial measurement signals are collected when the gripper assembly docks with a WIP carrying pod. The inertial measurement signals are analyzed to determine an initial positioning error of the gripper assembly with respect to the WIP carrying pod.