This document defines requirements and gives recommendations for the chemical composition, electrochemical properties, physical tolerances and test and inspection procedures for cast galvanic anodes of aluminium, magnesium or zinc-based alloys for cathodic protection in seawater, saline sediment and brackish water. This document is applicable to anodes in seawater and to anodes in brackish water and saline sediments. Information on salinity ranges can be found in Annex A. This document is applicable to most galvanic anodes used for seawater, saline sediment and brackish water applications, i.e. cast anodes of trapezoidal or circular cross section and bracelet type anodes. The requirements and recommendations of this document can also be applied to other anode shapes (e.g. half spherical, button) that are sometimes used for seawater applications. Whilst other metals can be used as galvanic anode material to protect more noble metals than iron and steel, such as soft iron, these are not covered in this document.