2018-350-FA (CMHRP activity #7950)

Field Activity 2018-350-FA

Identifier

2018-350-FA

Alternate names

18BIM01, 18BIM02

Purpose

1) Measure bathymetric change and borrow site deposition on the N. Chandeleurs island platform and 2) Single-beam bathymetry of the long term change lines.

Location

Chandeleur Islands, LA, Gulf of Mexico

Summary

Collected 36 seismic, 70 single-beam bathy and 112 multi-beam bathy lines.

Info derived

Bathymetric elevations (both multibeam and single-beam), depositional stratigraphy, and bench mark elevation control

Comments

Subfans: R/V Sallenger: 18BIM01 -chirp -multibeam R/V Jabba Jaw: 18BIM02 -single beam

Platform

Sallenger 26' Parker
Twin Vee (Jabba Jaw) 22-ft Twin Vee This boat has a carrying capacity of up to 1500 pounds and up to 7 people and a shallow draft (9 inches empty). This boat's cat hull design results in a smoother ride in choppy water, at the expense of a slightly deeper draft. This boat is powered by two Yamaha 70hp motors.

Vehicles

Chevy Suburban Silver

Ford F-350 Dually White (GSA)

Itinerary

Start	Biloxi, MS	2018-08-15
End	Biloxi, MS	2018-08-23
Days in the field	8

Bounds

West	-89.1376
East	-88.51818848
North	30.05356335
South	29.67091617

Marine operations

Yes

Personnel

Organization

USGS, St. Petersburg Coastal and Marine Science Center(SPCMSC)

600 Fourth Street South

St. Petersburg, FL33701-4846

(727) 502-8000

Principal investigators

Jennifer L Miselis

Crew members

Billy J Reynolds	Scientist, Staff
Nancy T DeWitt	Scientist, Staff
Joseph J Fredericks	Scientist, Staff
Hunter S Wilcox	Scientist, Staff

Information specialist(s)

Billy J Reynolds	Specialist, Information
Nancy T DeWitt	Specialist, Information
Joseph J Fredericks	Specialist, Information

Data types and categories

Data category:	Location-Elevation, Seismics, Sonar
Data type:	Benchmarks, Navigation, Profiles, Sub Bottom Profiler, Multibeam, Single Beam, Sound Velocity

Equipment used

Equipment	Usage description	Data types	Datasets
Other		Unknown, Multichannel, Boomer, Sub Bottom Profiler, Sparker, Bubble Gun, Air Gun / Water Gun, Ocean Bottom Seismometer, Sonobuoy	(no data reported)
Chirp 424		Sub Bottom Profiler	2
ODOM-Echotrac CV-100		Single Beam	1
TSS DMS-05 Motion Sensor		Interferometric, Single Beam	(no data reported)
Castaway-CTD		Sound Velocity	(no data reported)
Valeport SWiFT SVP		Sound Velocity	(no data reported)
Multibeam Bathymetry System	two Teledyne Reson SeaBat T50-P	Multibeam	1
Collapsible Tripod		Benchmarks, Navigation, Profiles, Transects	(no data reported)
Other		Unknown, Profiles, Transects, Benchmarks, LIDAR, Navigation	(no data reported)
Ashtech ProFlex 800 GNSS Receiver		Benchmarks, Navigation	(no data reported)
Choke Ring Antenna		Benchmarks, Navigation	(no data reported)
Applanix POS-MV DGPS/IMU		Navigation	2
GPS		Navigation	1

Datasets

Datasets produced in this activity

Dataset name	Equipment	Description	Dataset contact
2018-350-FA_segy	Chirp 424	Unprocessed digital chirp subbottom trace data	Arnell S Forde
2018-350-FA_seisimag	Chirp 424	Processed subbottom profile images	Arnell S Forde
Chandeleur_Islands_2018_SBB_xyz	ODOM-Echotrac CV-100	Single-beam bathymetry xyz data in both WGS84 (G1762) ellipsoid height and NAD83 NAVD88 GEOID 09	Chelsea A Stalk
Chandeleur_Islands_2018_MBES_xyz	Multibeam Bathymetry System	Processed elevation point data (xyz) as derived from a 1-meter grid provided in both WGS84 (G1762) ellipsoid height and NAD83 NAVD88 GEOID 09	Chelsea A Stalk
2018-350-FA_gis	Applanix POS-MV DGPS/IMU	GIS data for subbottom chirp	Arnell S Forde
2018-350-FA_nav	Applanix POS-MV DGPS/IMU	Navigation data for chirp subbottom	Arnell S Forde
Chandeleur_Islands_2018_SBB_Tracklines	GPS	Single-beam bathymetry tracklines in WGS84 (G1762)	Chelsea A Stalk