mushroom anchor
Noun
Meaning
an anchor used for semipermanent moorings; has a bowl-shaped head that will dig in however it falls
Source: WordNetSynonyms
Antonyms
Hypernyms
Examples
A mushroom anchor will normally sink in the silt to the point where it has displaced its own weight in bottom material, thus greatly increasing its holding power.
Mushroom anchor Mushroom anchor on the lightship Portsmouth in Virginia The mushroom anchor is suitable where the seabed is composed of silt or fine sand.
The disadvantage of using deadweight anchors in conditions where a mushroom anchor could be used is that it needs to be around ten times the weight of the equivalent mushroom anchor.