This International standard specifies the minimum operational and performance requirements, methods of testing and required test results conforming to performance standards not inferior to those adopted by the IMO in Resolution MSC.64(67) Annex 4 Radar clauses 3.3.9 and 3.3.10 for the optional requirements for superimposition of selected parts of SENC information. In addition it takes account of IMO Resolution A.694 and is associated with IEC 60945. When a requirement in this standard is different from IEC 60945, the requirements in this standard shall take precedence.