Planar diagrams of surface-links

The paper discusses planar diagrams (called charts by S. Kamada) for embedded (in $\Re^{4}$) or mapped in general position (in $\Re^{3}$) surfaces and shows that the diagrams are very suitable for dealing with such surfaces and for easy construction of surface mappings with specific properties. A series of examples is constructed, including an example of a sphere immersion with two triple points and a unique double line.