This document specifies the minimum requirements and gives recommendations for the chemical composition, the electrochemical properties, the physical tolerances, and the test and inspection procedures for cast galvanic anodes of aluminium, magnesium and zinc-based alloys for cathodic protection in sea water, saline sediment and brackish water. This document is applicable to the majority of galvanic anodes used for seawater sediment and brackish water applications, i.e. cast anodes of trapezoidal, or circular cross section and bracelet type anodes. The general requirements and recommendations of this document may also be applied to other anode shapes, e.g. half-spherical, button, etc., which are sometimes used for seawater applications. NOTE Whilst other metals can be used as galvanic anode material to protect more noble metals than iron and steel e.g. soft iron, these are not covered in this standard.