Final answer:
When installing a target patch, orientate it so that it overlaps the base sheet to create a watertight seal.
Step-by-step explanation:
When installing a target patch in relation to the base sheet, the patch should be orientated so that it overlaps the base sheet. This ensures that water will flow over the patch and onto the base sheet, rather than seeping into any gaps or joints between the patch and the base sheet.
For example, if you have a cone or vent with a base sheet around it, the target patch should be placed on top of the base sheet, covering the vent or cone. The edges of the patch should extend beyond the base sheet, creating an overlap. This helps to create a watertight seal that prevents any water from entering the structure.