(Askeri) İTİMAT YÜZEYİ: Hava yük araçları yük bölme numaralarının hesaplanmasında esas olan yüzey. Bu satıh genellikle, hava aracının burnunda veya burnu yakınından geçen dikey yüzeydir. Ayrıca bakınız: "station number"
الإنجليزية - الإنجليزية
تعريف datum planes في الإنجليزية الإنجليزية القاموس.
A datum plane is a theoretically exact plane established by the extremities or contacting points of the actual feature surface with a reference plane (surface plate or other checking device)
A horizontal plane used as a reference from which to determine heights or DEPTHS The plane is called a TIDAL DATUM when defined by a certain phase of the TIDE Datum planes are referenced to fixed points known as BENCH MARKS, so that they can be recovered when needed See also REFERENCE PLANE