Abstract: A low flight method for automatic course determination when approaching a given target site is disclosed wherein a terrain memory is used in which terrain points in grid type distribution of the terrain in question with height coordinates associated with them are stored digitally (digital terrain height model). By means of a rough analyzer, spaced at possibly variable first time intervals .DELTA.T over the multitude of points of the digital terrain height model, a first fan (F.sub.n) starting from a respective momentary flight position (P.sub.1) and oriented with its center direction (M.sub.F) toward the target site (P.sub.z) and consisting of several adjacent segments (S.sub.i) is placed. For each segment (S.sub.i) a mean value of the height coordinates of the terrain points situation in it is calculated, and the segment (S.sub.4) having the smallest mean value is determined. By means of a fine analyzer (4), within each of the first time intervals .DELTA.