This International Standard specifies the general requirements, methods of testing, and required test results, for the presentation of navigation-related information on shipborne navigational displays in support of IMO resolutions MSC.191(79) and MSC.302(87). (MSC191/1) IMO resolution MSC.191(79) harmonizes the requirements for the presentation of navigation-related information on the bridge of a ship to ensure that all navigational displays adopt a consistent human machine interface philosophy and implementation. (MSC191/1) IMO resolution MSC.191(79) supplements and, in the case of a conflict, takes priority over, the presentation requirements of the individual performance standards adopted by the IMO for relevant navigational systems and equipment and covers the presentation of navigation-related information by equipment for which Performance Standards have not been adopted by the IMO. (MSC302/3.6) In case of conflict with alert requirements of existing performance standards, the present Performance standards (MSC.302(87)) will take precedence. NOTE In case of conflict for alert presentation related issues the priority of IMO performance standards is from the highest MSC.302(87), MSC.252(83), MSC.191(79), , after which all performance standard are equal.