navigation and implementation of rules of the air and related procedures, using as appropriate, visual reference or navigation aids;
loingseoireacht agus cur chun feidhme rialacha an aeir agus nósanna imeachta gaolmhara, agus feidhm á baint chucu, más iomchuí, as amharcthagairt nó as áiseanna loingseoireachta;