FileInfo.com


.NAV File Extension


File Type 1 MSN Application Extension  (Most common)
File Format File
Common? No
File Description Adds additional functionality and file support to MSN application programs
Program(s) that open nav files Windows: Used by MSN programs; Should not be opened manually

File Type 2 Counter-Strike Bot Navigation File
File Format Proprietary File
Common? No
File Description Navigation mesh that represents walkable areas of a Counter-Strike: Source map (.BSP file); used by bots (computer-controlled characters), which allows them to know how to move around the map.

NAV files are automatically generated by Counter-Strike the first time a user attempts to play a custom map with bots; this may take several minutes or longer for large maps; the NAV generation process may also be started manually by typing nav_generate in the Counter-Strike console.

Navigation meshes can be edited manually by typing nav_generate 1 in the console with "sv_cheats" enabled.
Program(s) that open nav files Windows: Valve Counter-Strike: Source

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/nav