Sightings for AN/AQS-20 Sonar Test Event - April-May 2013

The U.S. Navy Marine Species Monitoring Program

Aerial surveys for marine-species monitoring occurred during 27 April through 02 May 2013 for an AN/AQS-20 (Q-20) sonar system test event. These surveys were conducted off the west coast of Florida in the Naval Surface Warfare Center Panama City Division (NSWC PCD) Study Area in the Gulf of Mexico. The Q-20 is a high-frequency active sonar (HFAS) system used in mine detection and countermeasures.

U.S. Navy protected marine species monitoring during Q-20 sonar testing

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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.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".

Attributes in dataset

Attribute (table column)	Description
oid	Unique ID number (generated by OBIS-SEAMAP)
sighting_no	Sighting No.
obs_date	Date of observation
sp_obs	Species name recorded
sp_tsn	Taxonomic Serial Number added by OBIS-SEAMAP
obs_count	Group size (best estimate)
count_high	Group size (high)
count_low	Group size (low)
calves	Number of calves (no calves sighted)
obs_time	Start time (local time zone)
stop_time	Stop time (local time zone)
bss	Baufort sea state
latitude	Latitude in decimal degrees
longitude	Longitude in decimal degrees
vert_angle	Vertical angle in degrees
bearing	Bearing angle in degrees
distance_org	Distance off track km (nmi) in original text
distance_km	Numeric distance off track km parsed out from distance_org
distance_nmi	Numeric distance off track (nmi) parsed out from distance_org
heading	Heading in degrees
bottom_depth_org	Bottom depth m (ft) in original text. Bottom depths were estimated by mapped figures. Precise estimation is not listed here.
bottom_depth_m	Bottom depth (m) parsed out from bottom_depth_org
bottom_depth_ft	Bottom depth (ft) parsed out from bottom_depth_org
photos_video	Flag of photo or video was taken (Yes/No)
focal_follow	Focal follow (Yes/No)
behavior	Behavioral Summary
geom	Geometry field added by OBIS-SEAMAP