In order to avoid an operator forgetting to actuate locking mechanism interposed between two elements, such as the pod cowls of an aircraft engine, when said elements are in the closed position, use is made of a closure fault indicator. The image-taking apparatus takes images by using an image pickup element. The magnetic fields interact to provide magnetic forces that provide a desired therapeutic effect, e. The optical fiber achieves reduced bending losses without significantly increasing numerical aperture. The invention includes as coupling for attaching the device to a water source such as a hose, a flow passage for directing water through the device and into the outboard motor, and an attachment portion for attaching the device to the outboard motor. The permanent node address places the second device into an active mode as a permanent node addressed device.