Table: HAUL

This is a unique numeric identifier assigned to each (VESSEL,CRUISE) combination

This is a unique numeric identifier assigned to each (VESSEL, CRUISE, HAUL) combination

Valid Values: AI=Aleutian Islands, BS=Bering Sea, GOA=Gulf of Alaska, WC=West Coast,HBS=Hydroacoustic Bering Sea, HG=Hydroacoustic Gulf of Alaska, HWC=Hydroacoustic West Coast, TAG=Denotes that no biological data exist for this cruise other than those related to tags released or recovered.

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

This is a six-digit number identifying the Cruise number of the form: YYYY99 (where YYYY = year of the cruise; 99 = 2-digit number and is sequential; 01 denotes the first cruise that vessel made in this year, 02 is the second, etc.

This number uniquely identifies a haul within a cruise. It is a sequential number, in chronological order of occurrence.

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

Date. This is the date and time at the beginning of the haul; For groundfish trawl data, this is the on-bottom time which is determined after we have looked at the bottom-contact sensor and net-mensuration plots. For hydroacoustic data, start_time is when the first fish is captured (displayed on the net sounder) or when the net is at target depth and location.

Decimal hour. This is the elapsed time between start and end of a haul. The bottom contact sensors showed up in 1994 and were put into service in GOA in 1995 and EBS in 1996. We assume that DURATION is On bottom minus Off bottom started along with BC use

kilometers (km) in thousandths of a km

Measured or estimated distance (m) between wingtips of the trawl.

This is a Y/N field, to indicate whether the NET_WIDTH was measured or estimated: Yes (Y) means that NET_WIDTH was measured and (N) indicates that NET_WIDTH was calculated

Measured or estimated distance (m) between footrope and headrope of the trawl.

RACE database statistical area for analyzing data. Strata were designed using bathymetry and other measures of habitat and are unique to each survey series.

The latitude (decimal degrees) at the start of the haul

The latitude (decimal degrees) at the end of the haul

The longitude (decimal degrees) at the start of the haul.

The longitude (decimal degrees) at the end of the haul

Alpha-numeric designation for the Station established in the design of a Survey.

Meters (m). Weighted average depth (m) of trawl measured at the headrope (Groundfish) or footrope (MACE). Prior to (year?), before NET-HEIGHT was regularly measured, this value was used synonymously with BOTTOM_DEPTH.

Meters (m). Weighted average depth (m) and is calculated by adding GEAR_DEPTH to NET_HEIGHT. Prior to (year), before NET_HEIGHT was regularly measured, this value was obtained using either echosounder or bathythermograph.

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

Surface temperature, in tenths of a degree, Celsius. Null values indicate temperature not recorded.

Weighted average temperature (in tenths of a degree Celsius) measured at the maximum depth of the headrope of the trawl. Null values indicate temperature was not recorded.

meters (m); Length of trawl wire (warp) deployed.

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

Codebooks: https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual

This is a unique identifier for each record in the base table, to be used in corresponding audit tables to identify the original record in the base table

Biomass hauls are defined as positive performance survey trawl hauls (i.e., haul performance considered to be acceptable) from an Alaska Fisheries Science Center bottom trawl survey time-series for which a sampling design, gear type, accessory type, tow duration and survey methodology are standardized such that the distance fished and average net spread from those hauls can be used to calculate an area swept for standardizing catch sample weights and numbers by survey year and by taxon or taxonomic group in terms of Catch per Unit Effort (CPUE). CPUEs are used to derive estimates of biomass, population size, abundance-at-length and abundance-at-age that can be used to index or monitor trends in marine life populations over the span of the respective survey time-series for purposes of stock assessment, ecosystem monitoring or other research.