Often the DP was taken as the pintle center of the right-most gun in a battery, as an observer looked over the battery towards the sea. In this case, the referenced gun was called the directing gun. In a two-gun battery, the DP was often located at a point midway between the two guns (as in the battery illustrated at right). In a four-gun battery, the DP was often located midway between the two central guns. When the guns of a battery were more widely separated, the DP was often taken as a point on the ground perhaps 50 to 100 feet in front of the guns and more or less at the midpoint of the horizontal extent of the battery, visible from all of its guns. An example of such a directing point can be found at Fort Strong, a Coast Artillery fort on Long Island in Boston Harbor ().