Reson SeaBat 7125 ROV, Operator'S Manual

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SeaBat 7125 ROV Operator‟s Manual
Page v May 30, 2011
Version 3
5.7.6 Screen Recording (Video Recording) ..................................................... 76
5.7.7 I/O Module Setup ................................................................................... 77
5.7.8 Data Playback ........................................................................................ 77
5.8 7k Center Console Window ........................................................................... 82
5.9 Software Release Information ........................................................................ 83
6 Active Sonar Usage ................................................................. 84
6.1 Chapter Overview .......................................................................................... 84
6.2 Enhancing the Sonar Image .......................................................................... 85
6.2.1 Pulse Length and Image Resolution ....................................................... 85
6.2.2 Transmit Power OFF .............................................................................. 85
6.2.3 Lower Ping Rate .................................................................................... 85
6.2.4 Receiver Gain ........................................................................................ 86
6.2.5 Variable Swath ....................................................................................... 86
6.2.6 Correct Range Setting ............................................................................ 88
6.2.7 Use of Gates .......................................................................................... 89
6.3 System Efficiency .......................................................................................... 91
6.3.1 Auto Pilot ............................................................................................... 91
6.3.2 Roll Stabilization .................................................................................... 92
6.4 Use of Displays .............................................................................................. 94
6.4.1 Equidistant versus Equiangular Beam Mode .......................................... 94
6.4.2 Wedge versus B-Scan Display ............................................................... 94
6.4.3 A-Scan, Phase and Magnitude Displays ................................................ 94
6.5 Compensation for Environmental Conditions ................................................. 94
6.5.1 Loss of Sound by Absorption ................................................................. 95
6.5.2 Loss of Sound by Spreading .................................................................. 96
6.5.3 Sound Velocity ....................................................................................... 97
6.6 Limitations ..................................................................................................... 98
6.6.1 Cavitation ............................................................................................... 98
6.6.2 Machinery Noise .................................................................................... 98
6.6.3 Speed .................................................................................................... 99
6.6.4 Air Bubbles............................................................................................. 99
6.6.5 Environment ......................................................................................... 100
7 System Performance and Data Types .................................. 101
7.1 Data Types .................................................................................................. 102
7.1.1 Bathymetry Data .................................................................................. 102