MIL-PRF-89033 (AMENDMENT 1), PERFORMANCE SPECIFICATION: VECTOR SMART MAP (VMAP), LEVEL 1 (27 MAY 1998) [SUPERSEDING MIL-V-89033]., This amendment forms a part of MIL-PRF-89033, dated 1 June 1995, and is approved for use by all Departments and Agencies of the Department of Defense.