рельєф дна
contour line (contour)
adjacent contour
contour
contour interval
index contour line (cart.)
intermediate contour line
supplementary contour
barrel contour
Functional Hardware and Software Contour (FHSC)
wing contour
contour chart
contour flying
contour line
contour search
approximate contour
terrain contour matching (TERCOM, TERRCOM)
depression contour
defense in depth
depth bomb / charge
depth curve
depth of battlefield (battlespace)
depth of formation
depth of penetration
depth of the service area
depth sounder
diving depth
echo depth finder
lateral and in-depth dispersion
march depth
position defense (in depth)
shallow depth
wargaming methods / techniques (belt, avenue in depth, box, belt-in-time)