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There are a number of data fields in the PacFIN trawl logbook tables which specify the trawl location. All, except lbk_trip.region, are columns of the lbk_tow table. In an attempt to provide continuity in the available data, some data fields, if not supplied by the data source, are derived from other supplied data fields (e.g. PSMFC area ID from block number).

Location/Position data fields are: