To direct in a helicopter, give a back azimuth, ie, helicopter bearing to you. Compass typically used with a topographical map for navigation and position determination. Topographical Maps - Portray terrain features including elevation. Contour lines represent constant elevation. Every 5th line an index contour line.
Closer contours are together, steeper terrain.
Map border information - Adjacent maps, coordinate system info. Colors, shading, basic map symbols, and distance scale. Declination diagram - True North, Magnetic North, Grid North. Orienting map to true north and terrain. Using compass with topo map, magnetic declination must be compensated for.