Thomas Morley, Encyclopædia Britannica, Ninth Edition…
“ The stream anchor is for use in a river or sheltered place, where a small anchor is sufficient to hold the ship. The stern anchor is use when it is required to moor at both head and stern, as is the case when there is not room for the ship to swing with the tide. The kedge anchors are generally of different sizes, one large and one small; they are used to warp the ship along a narrow channel, the kedge being carried out in a boat with the hempen cable attached to it, and dropped; the ship can then still be hauled to the anchor. ”
