Abstract: The paper presents a system of bottom classification with geographical context mapping. It combines two previously developed subsystems, viz.: EchoBase - a portable dynamic Geographical Information System and Visual Bottom Typer (VBT) System. A newly developed version of the system was supplemented with interprocess communications mechanisms which allow transfer of data from one system to the other. These two software packages can run concurrently in multitasking. The MS Windows operating environment provides a mapping possibility of a classified sea bed type with an on-line geographical visualization on the nautical map. Both systems were presented separately in previous Symposiums' proceedings.