The NAVIGATION technique is very e , ective to obtain or classify a Finsler metric from a given a Finsler metric (especially a Riemannian metric) under an action of a vector , eld on a di , erential manifold. In this survey, we will survey some recent progress on the NAVIGATION problem and conformal vector , elds on Finsler manifolds, and their applications in the classi, cations of some Finsler metrics of scalar (resp. constant) ag curvature.