TGS Seismic Survey Acoustic Detections in Chukchi Sea 2013

ASRC Energy Services, Inc.
TGS-NOPEC Geophysical Company
RPS

TGS-NOPEC Geophysical Company (TGS) conducted a 2D marine seismic survey along predetermined lines in U.S. Federal and international waters of the Chukchi Sea during the open-water season from 25 August to 30 October 2013. Two vessels were involved including 1) a seismic vessel (Geo Arctic) towing a 3,280 cu.in. seismic array and 8,100 m long solid streamer cable and 2) a marine mammal monitoring vessel (Norseman) which operated in advance of the seismic vessel. Both vessels had teams of visual protected species observers (PSOs) trained to monitor and implement seismic mitigation according to regulatory permits from U.S. Agencies. Twenty-six detections were made over 1195.5 hours of acoustic monitoring. In addition to acoustic monitoring, the monitoring vessel also employed visual protected species observers (PSOs). This data set includes acoustic detection data and visual sighting data is presented separately.

N/A

In numeric fields, original data may contain 'X' which was replaced with Null.

Overview

This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.

Attributes in dataset

Attribute (table column)	Description
oid	Unique ID number (generated by OBIS-SEAMAP)
obs_date	Date of observation
obs_time	Time of First Detection (local time zone)
latitude	Latitude in decimal degrees
longitude_w	longitude (W) in decimal degrees
longitude	Longitude in decimal degrees
sp_obs	Species name recorded
sp_tsn	Taxonomic Serial Number added by OBIS-SEAMAP
certainty	Certainty of Identification
animals_detected	Number of Animals Detected (contains string)
obs_count	Numeric count of animals detected
geom	Geometry field added by OBIS-SEAMAP