Technical Appendix S6 Ichthys Gas Field Development Project: benthic habitat mapping of the Darwin region—methods of data collection, collation and map production Ichthys Gas Field Development Project: Benthic Habitat Mapping of the Darwin Region— Methods of data collection, collation and map production Rev 0 | 30 March 2011 INPEX Document No. C036-AH-REP-0121 Phone: +61 408 857 056 E-mail:
[email protected] Address: 8/260 West Coast Highway Scarborough, WA Web: www.geooceans.com Table of Contents 1. Introduction.............................................................................5 2. Data collection methods ........................................................6 2.1. Towed video survey ................................................................................... 6 2.1.1. Field sampling ............................................................................................ 6 2.1.2. Video transects .......................................................................................... 6 2.1.3. Towed video system .................................................................................. 6 2.1.4. Video data analysis and habitat classification............................................ 7 2.1.5. Quality assurance and quality control ........................................................ 9 2.1.6. Bathymetry ................................................................................................. 9 2.1.7. Depth correction for tide..........................................................................