In 1972, the U.S. proclaimed a contiguous zone extending from 3 to 12 miles offshore (Department of State Public Notice 358, 37 Fed. Reg. 11906 (June 15, 1972), consistent with the 1958 UN Convention on the Territorial Sea and Contiguous Zone.
The aperture of a lens is the opening in the diaphragm that controls how much light is allowed to reach your focal plane (film or sensor). The aperture is usually rated as a fraction of the focal length, hence the f/x.y nomenclature. The wider an aperture is, the more light it allows through, and the smaller the number under f/ is.
EXPOSURE Refers to the amount of light in the photo. Too much light results in over-exposure. Too little light results in under-exposure Exposure is directly related to Shutter Speed & Aperture. SHUTTER SPEED Controls the amount of time the shutter remains open. Is used in conjunction with Aperture to control light.