Garmin GPSMAP 188C Sounder User Manual Page 88
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- Table of contents
- BOOKMARKS
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82 GPSMAP 188/188C Sounder Owner’s Manual
USING SONAR > SONAR PAGE
Whiteline—controls how the unit displays
information about the bottom type (hard or soft).
With the Whiteline Off, the bottom return displays
as red and contains no information on bottom
hardness. With Whiteline set at Normal or 1-100%,
the bottom return becomes white with a red line
indicating where the water meets the bottom. To
turn the Whiteline Off, press the ROCKER down
until the setting bar is all the way at the bottom
of the range and reads Off. See page 91 for more
detail on this feature.
Frequency—allows you to choose a transducer
frequency. Frequency refers to the pitch of the
sound that the transducer sends and receives. You
can choose 200kHz, 50kHz, or Dual frequency.
Depth Line—adds a horizontal depth line across
the display that is used to measure the depth of
underwater objects. The depth of the line appears
in a box on the right side of the line. Press up or
down on the ROCKER to control the position of
the line on the graph. The depth is displayed in a
window on the right side of the line. To turn the
Depth Line Off, press the ROCKER up until the
setting bar is all the way at the top of the range
and reads Off.
Noise Reject—helps filter unwanted noise from
the graph. The Noise Reject tool can be turned Off,
set to Normal (automatically adjusts for optimum
viewing), or to a fixed 1-100% setting. When
setting the Noise Reject tool, the HIGHER the
noise rejection setting, the less likely the unit is
to NOT show fish or structures. To turn the Noise
Reject Off, press the ROCKER down until the
setting bar is all the way at the bottom of the range
and reads Off.
Whiteline
Adjustment
Frequency
Adjustment
Depth Line
Adjustment
Noise Reject
Adjustment
- 188/188C Sounder 1
- INTRODUCTION 3
- Table of Contents 4
- Care Information 6
- BASIC OPERATION 7
- Simulator Mode 9
- Adjusting the Backlight 10
- Interface Keys 11
- On-Screen Buttons 12
- Using the Map Pointer 13
- Creating and Using Waypoints 14
- Man OverBoard (MOB) 16
- To change the waypoint name: 17
- Navigating to a Destination 18
- Selecting a Go To Graphically 19
- 2. Press NAV 20
- . When the track is 21
- BASIC OPERATION > ROUTES 23
- Review Page: 24
- By Name or Nearest tab list 25
- You can also Find 26
- Additional Information 27
- Understanding Distress Calls 28
- Receiving DSC Calls 29
- New Directory Item Page 30
- Setting up DSC 31
- MAIN PAGES 32
- Map Page 33
- Selecting Map Ranges 35
- Map Page Options 36
- MAIN PAGES > MAP PAGE 37
- Pointer Page 39
- Numbers Page 40
- Highway Page 41
- Highway Page Options 42
- Active Route Page 43
- Active Route Page Options 44
- MAIN MENU 45
- WAAS Capability 46
- MAIN MENU > GPS TAB 47
- Tide Tab 49
- MAIN MENU > TIDE TAB 50
- AIN MENU > TIDE TAB 51
- Trip Tab 52
- Celes (Celestial) Tab 53
- Points Tab 54
- User Waypoint List 55
- AIN MENU > POINTS TAB 56
- Proximity Waypoint List 57
- Routes Tab 59
- Route Review Page 60
- Route Review Menu Options 61
- AIN MENU > ROUTES TAB 62
- Route Pages 63
- To delete a route: 64
- Track Tab 65
- MAIN MENU > TRACK TAB 66
- AIN MENU > DSC TAB 67
- Card Tab 68
- Time Tab 68
- Pages Tab 69
- General Sub Tab 70
- Source Sub Tab 70
- Waypoints Sub Tab 71
- Points Sub Tab 72
- Nav Line Sub Tab 73
- Hiway (Highway) Tab 74
- Temp (Temperature) Tab 74
- Sonar Tab 74
- Systm (System) Tab 75
- Units Tab 76
- Manually enter a 77
- Comm (Communications) Tab 78
- AIN MENU > COMM TAB 79
- Advanced NMEA Output 80
- Setup Page 80
- Distance shows 81
- Status Field 81
- SNR and 81
- Alarm Tab 82
- To set an alarm: 83
- USING SONAR 84
- Using the Adjustment Menu 85
- USING SONAR > SONAR PAGE 86
- Sonar Page Options 89
- Sonar Tab Options 91
- Depth Scale (Overlay) 92
- Color Bar 92
- Keel Offset: 93
- Transducer 93
- To calibrate the water speed: 94
- 20' 95
- 10' 95
- Transducer Coverage 96
- Whiteline 97
- Thermoclines 97
- APPENDIX 98
- Mounting the GPS Antenna 99
- Using the Gimbal Mount 100
- (GPSMAP 188C Shown) 101
- Installing the Transducer 102
- Transom Mount Transducer 103
- 104
- Interfacing 105
- Satellite Information 107
- What is WAAS? 108
- APPENDIX > WHAT IS MMSI? 109
- Navigation Terms 110
- PPENDIX > NAVIGATION TERMS 111
- Messages 112
- APPENDIX > MESSAGES 113
- LORAN TD System 114
- Loran TD Setup Page 115
- Optional Accessories 116
- Software License Agreement 117
- Product Registration 117
- Limited Warranty 118
- FCC Compliance 119
- Safety Information 120
- 190-00585-00 Rev. A 126
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