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Fishing effort is determined using a speed-based approach, where successive vessel positions meeting specified speed criteria are used to construct estimated fishing tracks. Vessel trip and fishing track IDs are generated in the PacFIN database by using the 'Comprehensive VMS' database table and applying the maximum fishing speeds associated with each declaration code, as determined by the CalPoly/BOEM study. Each consecutive record above speed 0 and below the maximum threshold becomes a \u201cfishing track point\u201d, from which the fishing tracks are created. Fishing tracks are summarized using a 1-minute grid system, with statistics calculated for each grid unit. Unique vessels are accounted for among summaries, including those associated with \u2018grouped\u2019 declaration codes. Whiting 'group' fishery: 'Group' summary of 3 individual declaration codes; Limited entry midwater trawl, Pacific whiting shorebased IFQ: declaration code 221, Limited entry midwater trawl, Pacific whiting catcher/processor sector: 222, and Limited entry midwater trawl, Pacific whiting mothership sector - catcher vessel or mothership: 223. Maximum speeds for fishing activity: 221 = 4.45 kn, 222 = 4.71 kn., 223 = 4.65 kn. Data have been filtered for confidentiality (3+ vessels). Filtering: Data are filtered for confidentiality and to remove grids intersecting ports, those outside the U.S. Exclusive Economic Zone (EEZ), and those with over 50% of the area on land. 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