MIL-PRF-32030, PERFORMANCE SPECIFICATION: DIGITAL BATHYMETRIC DATA BASE ? VARIABLE RESOLUTION (DBDB-V) (27 MAY 1998)., This specification defines the content and format for the U.S. Naval Oceanographic Office NAVOCEANO Digital Bathymetric Data Base -Variable Resolution (DDBDB-V) product. DBDB-V is a digital bathymetric data base that provides ocean depths at various gridded resolutions.