The P-Formats for the exchange of positioning data are recommended by the IOGP for general use in the upstream oil and gas industry. They supersede earlier UKOOA P1, P2 and P6 formats. Parallel discussions with the Society of Exploration Geophysicists (SEG) covered deprecation of their SEG-P1 format and recognition of the revised IOGP P1/11 format as its replacement. These formats have been developed in response to ever evolving acquisition and processing technologies. IOGP P2/11 replaces UKOOA P2/94, and version 2.0 of the P2/11 format (this document) supersedes the previous version (1.1). in November 2012 and this is a full update. They superseded earlier UKOOA P1 and P2 formats. A revision of 483-6 (P6/11) is in preparation.