Application of Anchor The anchor is an equipment used when vessel is approaching to port or harbor. The anchor is tied on the iron line on board and put into the seawater to help the vessel in stability and security. Various kinds of anchor are sold, such as marine anchors, Hall anchor, Foldable Anchor, mushroom anchor, triangle anchor, admiralty Anchor, Speke anchor, HHP stockless anchor, Danforth anchor, etc.