However, this viewpoint contrasts sharply with the case of the plane as a 2-dimensional real manifold. The isomorphisms are all conformal bijections of the complex plane, but the only possibilities are maps that correspond to the composition of a multiplication by a complex number and a translation. The topological plane has a concept of a linear path, but no concept of a straight line. The topological plane, or its equivalent the open disc, is the basic topological neighborhood used to construct surfaces (or 2-manifolds) classified in low-dimensional topology. A plane is the two-dimensional analogue of a point , a line and three-dimensional space. Sometimes the word plane is used more generally to describe a two-dimensional surface, for example the hyperbolic plane and elliptic plane. The main controls allow the pilot to direct the aircraft in the air by controlling the attitude and engine thrust. And planes that intersect along a line are called Intersecting planes. Bush plane n ...