Visitation and Search. The right of warships of a belligerent power to stop shipping, on the high seas or territorial waters of an enemy, for the purpose of searching them for contraband. No claim for loss or expense incurred by the searched ship can be made against the belligerent power for the reasonable exercise of this right. Visibility. Term used to express the clearness of the atmosphere and the maximum range at which objects and lights can be clearly sighted. Thirty-one miles is 'excellent visibility'. Visibility. Of a light, given on charts, is the distance at which it can be seen on a dark night, with clear atmosphere, by an observer whose height if eye is 15 ft. above level of high water.