ENVIRONMENT
- loingseoireacht Reference an Ghníomhaireacht Eorpach Comhshaoil (GEC)
- ga
- navigation
- en
- Definition 1.The science or art of conducting ships or aircraft from one place to another, esp. the method of determining position, course, and distance travelled over the surface of the earth by the principles of geometry and astronomy and by reference to devices (as radar beacons or instruments) designed as aids. Reference 1.WEBSTE;