Overview

BRIDGE DECK
Science office
Technical support office
Operations office
Nitrogen generator

CORE DECK
Core receiving
Core splitting/sampling
Core description
Microscopy
Paleomagnetism
Paleontology prep
Petrophysics
Stratigraphic correlation
Downhole measurements
Electronics shop
Science container
Lab chemicals

FO'C'S'LE DECK
Chemistry
Microbiology
Thin section
X-ray
Sample preparation
Conference room
Imaging office
Publications office
Staff office
Hospital
Lab chemicals

MAIN DECK
Mess hall, galley, laundry

'TWEEN DECK (forward)
Recreation

'TWEEN DECK (lower)
Computer & data services

HOLD DECK
Core storage

FANTAIL
Underway geophysics

Accommodations

Ship's systems

Fantail: Underway Geophysics Lab

Download Fantail deck in PDF format.
Download Fo'c's'le and Fantail decks poster in PDF format.

Function

The primary function of the Underway Geophysics lab is to acquire navigation and bathymetric (3.5 and 12 kHz) data, and provide and maintain the sound sources used for check shots and vertical seismic profile experiments. In addition to their scientific uses, geophysical data are used to ensure the drilling safety of the ship by confirming site positions and identifying potentially dangerous seafloor and subseafloor characteristics. The lab also has the infrastructure to support seismic reflection surveys, although a seismic acquisition system is not available for routine deployment.

Instruments

Seismic Sound Sources

• Sercel 210 in³ GI Gun pneumatic sound source: configurable to "True GI Mode" and up to 255 total in³; used as a sound source for downhole logging operations and towed seismic surveys
• Sercel G. Gun Parallel Cluster pneumatic sound source: the cluster is composed of two 250 in³ G. Guns separated by 1 meter; used as a sound source for downhole logging operations

Bathymetry

• SyQwest Bathy 2010 CHIRP Sub-bottom Profiler and Bathymetric Echo Sounder: 3.5 kHz frequency obtained with a 12 x TR-109 transducer array driven by a 10 kW power amplifier; 12 kHz frequency obtained with an EDO-323C transducer
  
• Transducers are housed in the forward sonar dome
  
• Two EPC Model 9802 Thermal Graphic Recorders

Navigation

• Integrated navigation software
  
• Two Ashtec GG24 GPS+GLONASS receivers with antennas
  
• Compass: Scandinavian Micro Systems LR40DC Digital Gyro Repeater