(8)For ensuring safety of navigation, Member States should identify inland waterways with a maritime character in accordance with harmonised criteria. The competence requirements for navigating on these waterways should be defined at Union level. Without unnecessarily limiting the mobility of boatmasters, when it is necessary for ensuring the safety of navigation, and where appropriate in cooperation with the relevant European River Commission, Member States should also have the possibility to identify the waterways that present specific risks for navigation in accordance with harmonised criteria and procedures pursuant to this Directive. In such cases, the related competence requirements should be set at national level.