mooring anchor(n = noun.artifact) - an anchor used to hold a mooring buoy or a channel marker in place;
is a kind of anchor, ground tackle

anchor, anchor chain, anchor escapement, anchor light, anchor ring, anchor shot, anchor space, anchor watch, cast anchor, drop anchor, grapnel anchor, mooring, mooring line, mooring mast, mooring tower, mushroom anchor, sea anchor, sheet anchor, waist anchor, weigh anchor, weigh the anchor