A line following the general contour of the shore, except that in cases of inlets or bays less than 30 NM in width, the line shall pass directly across the inlet or bay to intersect the general contour on the opposite side.
Is adifferent from a coast? Yes, it is!A shore or shoreline is the of land at the edge of a large body of . The coast is used when land meets the ocean. The word shore is used when land meets a large body of water, like an ocean or lake. In contrast to a coast, a shore can border any body ofwater, while the coast must border an ocean; that is a coast is a type of shore. Shore is often substituted for coast where an oceanic shore is meant.
Read more: http://scienceray.com/earth-sciences/a-shoreline/#ixzz1CydLiUSb