Anchor
An anchor is a device, normally made of metal, used to connect a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. The word derives from Latin "ancora", which itself comes from the Greek ἄγκυρα ("ankura").
Offshore embedded anchors
Anchor piles are hollow steel pipes that are either driven or drilled and grouted into the seabed, similar to pile foundations commonly used in offshore fixed structures. The figure shows the different installation methods whereby the driven steel tube is driven mechanically by a driving hammer, whilst the cast in-situ grouted pile is inserted into an oversize borehole constructed from a rotary drill and subsequently grouted in cement. Both methods are commonly used offshore depending on the geophysical and geotechnical properties of the seabed.