11.3 Patch Test Criteria............................................................................................................... 132
11.3.1 Latency Test ................................................................................................................ 132
11.3.2 Roll Test....................................................................................................................... 133
11.3.3 Pitch Test..................................................................................................................... 134
11.3.4 Yaw Test ...................................................................................................................... 135
11.4 Solving for the Patch Test.................................................................................................... 136
11.5 History ................................................................................................................................. 136
11.6 Basic data collection criteria ............................................................................................... 137
11.7 Patch Test data collection error areas............................................................................... 137
11.7.1
Positioning
.................................................................................................................. 137
11.7.2
Feature chosen for test
.............................................................................................. 137
11.7.3
Water depth
............................................................................................................... 138
11.7.4
Use predefined survey lines
....................................................................................... 138
11.7.5
Speed
.......................................................................................................................... 138
11.7.6
Vessel line up
.............................................................................................................. 138
11.7.7
Pole variability
............................................................................................................ 138
11.8 Improving the Patch Test and Patch Test results ..............................................................139
11.8.1
Need to collect sufficient data
................................................................................... 139
11.8.2
Individually solving values
.......................................................................................... 140
11.9 Truthing the patch test....................................................................................................... 140
12 APPENDIX VI: Basic Acoustic Theory ....................................................................................141
12.1 Introduction......................................................................................................................... 141
12.2 Sound Velocity..................................................................................................................... 141
12.2.1 Salinity......................................................................................................................... 143
12.2.2 Temperature ............................................................................................................... 143
12.2.3 Refraction Errors ......................................................................................................... 143
12.3 Transmission Losses ............................................................................................................ 144
12.3.1 Spreading Loss............................................................................................................. 144
12.3.2 Absorption................................................................................................................... 145
12.3.3 Reverberation and Scattering ..................................................................................... 149
Page 10 of 210
Version 5.0 Rev r002
Date 05-08-2014
Part No. 96000001
