Commercial Fishing Blocks - Pre Jan 1, 2025 - R7 - CDFW [ds3093]

Commercial fishing reporting blocks for the state of California. This feature [ds3093] and its complementary feature (Offshore Commercial Fishing Blocks (pre Jan 1, 2025) [ds3138] are for reference to California commercial fisheries catch and effort data up to December 31, 2024. For data after this date, please refer to the current feature: Commercial Fishing Blocks - R7 - CDFW [ds3204].

In 1933 the Division of Fish and Game divided the ocean waters of the state into sections, or blocks. Each block is ten minutes of longitude by ten minutes of latitude (roughly ten miles square). This system was carried out to about fifty miles from shore. Beyond this was constructed one row of blocks thirty minutes of longitude and thirty minutes of latitude to take care of any extension of fishing grounds. For more information see: Bureau of Commercial Fisheries. 1935. Fish Bulletin No. 44. The Commercial Fish Catch of California for the Years 1930-1934, Inclusive.