Garmin GPSMAP 396 User Manual Page 151
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GPSMAP 396 Owner’s Manual 143
settIng uP And usIng sonAr > understAndIng sonAr
Transducer Coverage
The area covered by the transmitted sound waves is determined
by the cone angle of the transducer and the water depth. The wide
cone angles (40°) associated with low frequencies (50 kHz) provide
a large coverage area for nding sh within a coverage width that
is approximately 2/3 of the water depth. However, this also means
that wide cone angles produce less bottom detail and resolution. As
shown in the drawing on the near right, the 40° cone angle produces
a coverage area of approximately a 20-foot diameter circle at a
30-foot depth.
The narrow cone angles (10°) associated with the high frequencies
(200 kHz) provide better bottom resolution and crisper detail, but
cannot show a large coverage area for nding sh. The 10° cone
angle provides a coverage width that is approximately 1/5 of the
water depth. As shown in the drawing on the far right, the 10° cone
angle produces a coverage area of approximately a 6-foot diameter
circle at a 30-foot depth.
Dual frequency mode combines both frequencies to get the best
coverage area and contour/depth readings.
40° Cone Angle (50 kHz)
Coverage
Diameter
Depth
10° Cone Angle (200 kHz)
Coverage
Diameter
Depth
- Owner’s Manual 1
- IntroductIon 3
- Table of Contents 4
- Warnings 7
- Battery Warnings 8
- Important Information 8
- GettInG Started 9
- Charging the GPSMAP 396 10
- Turning On the GPSMAP 396 11
- Getting Satellite Signals 12
- Receiver Status 13
- GPS Tab Options 14
- GPS Tips 14
- Learning About the Keypad 15
- Using the GPSMAP 396 16
- GPSMAP 396 Owner’s Manual 9 17
- On-Screen Button 17
- GPSMAP 396 Databases 18
- MapSource Detailed Maps 18
- Simulator Mode 19
- Entering a New Location 20
- Aviation Mode Page Sequence 21
- Creating a Direct To 22
- GPSMAP 396 Owner’s Manual 15 23
- Go To Page: Recent Tab 23
- 16 GPSMAP 396 Owner’s Manual 24
- Airport Tab of Details Page 24
- Usage Restrictions Page 24
- Finding a Nearby Point 25
- 18 GPSMAP 396 Owner’s Manual 26
- Information Page for a VOR 26
- GPSMAP 396 Owner’s Manual 19 27
- ARTCC Tab 27
- 20 GPSMAP 396 Owner’s Manual 28
- Nearest Pages: Airspace Tab 28
- Setting Airport Criteria 29
- Selecting an Approach 30
- Understanding Vectors 31
- Finding Points on Land 32
- Marking a Waypoint 33
- Following your Flight Plan 35
- Map Orientation 37
- Selecting Map Ranges 37
- Panning the Map 38
- Airspace Information 39
- Measuring Distance 40
- Setting the Bug Indicator 41
- Setting Up the Map Page 41
- 34 GPSMAP 396 Owner’s Manual 42
- Changing a Data Field 42
- Additional Map Data 43
- Terrain Page 44
- GPSMAP 396 Owner’s Manual 37 45
- Obstacle Warning 45
- Shown on the Panel Page 45
- Terrain Page Options Menu 45
- 38 GPSMAP 396 Owner’s Manual 46
- Terrain Setup Page 46
- Panel Page 47
- Setting Up the Panel Page 48
- Manually Setting a Course 48
- Distance to Target 49
- Distance to Profile 49
- Target Altitude 49
- Active Route Page 51
- Position Data Page 52
- Flight Log 53
- Aircraft Information 54
- GPSMAP 396 Owner’s Manual 47 55
- Weight & Balance Tab 55
- To calculate winds aloft: 57
- XM Audio Page 58
- XM Audio Page Options 59
- Using Favorites 60
- Scanning XM Radio Channels 61
- Turning Audio On or Off 61
- Automotive Mode Page Sequence 62
- Navigating in Automotive Mode 63
- 56 GPSMAP 396 Owner’s Manual 64
- Waypoint Page 64
- Finding an Iteman Item 65
- Recently Found Items 66
- Viewing the Information Page 67
- Find Menu Options 67
- Creating Routes 68
- GPSMAP 396 Owner’s Manual 61 69
- Creating Waypoints 70
- GPSMAP 396 Owner’s Manual 63 71
- Map Feature Information Page 71
- 64 GPSMAP 396 Owner’s Manual 72
- Following an Automotive Route 73
- Editing Your Route 74
- Creating a Detour 75
- Highway Page 77
- Highway Page Options 78
- Current Route Page 79
- Trip Computer 80
- Editing and Managing Routes 81
- Navigating a Saved Route 82
- Editing a Route 82
- To add points to the route: 83
- To edit the route on the map: 84
- GPSMAP 396 Owner’s Manual 77 85
- Waypoint Review Page 85
- Points Tab in the Main Menu 85
- 78 GPSMAP 396 Owner’s Manual 86
- Name eldSymbol eld 86
- Adding a Waypoint to a Route 87
- Projecting a Waypoint 88
- GPSMAP 396 Owner’s Manual 81 89
- Managing Points 90
- User Points Tab 90
- Deleting Waypoints 91
- Proximity Points 92
- To add a proximity waypoint: 93
- Managing Your Tracks 94
- To clear the track log: 95
- To save the entire track log: 95
- Saved Sub Tab 96
- Navigating a Saved Track 97
- TracBack Tips 97
- Marine Mode Page Sequence 98
- Navigating in Marine Mode 99
- Map Page 100
- Compass Page 101
- Using the Marine Timer 102
- GPSMAP 396 Owner’s Manual 95 103
- DSC Page 103
- Understanding Distress Calls 104
- Receiving DSC Calls 104
- GPSMAP 396 Owner’s Manual 97 105
- DSC Call List 105
- Setting up DSC 107
- MaIn Menu 108
- Weather Tab 109
- Flights Tab 110
- Route Tab 110
- Points Tab 111
- Track Tab 111
- Sonar Tab 112
- Aircraft Tab 112
- Alarms Tab 113
- System Alarms Sub Tab 114
- Weather Alarms Sub Tab 115
- Celestial Tab 116
- Tide Sub Tab 117
- AIn Menu > celestIAl tAb 118
- Hunt & Fish Sub Tab 119
- Message Tab 120
- Display Tab 121
- Sound Tab 122
- Setup Tab 123
- Road Routing Sub Tab 124
- Guidance Sub Tab 125
- Timers Sub Tab 126
- Time Sub Tab 126
- Location Sub Tab 127
- Welcome Sub Tab 128
- Interface Sub Tab 129
- AIn Menu > setuP tAb 130
- Advanced NMEA Output Setup 132
- Viewing XM WX Weather 133
- Setting XM WX Weather Options 134
- Weather Explorer Tab 135
- Avtn Wx Tab 135
- Srfc Wx Tab 136
- Mrn Wx Tab 136
- Using the Weather Tab 137
- Weather Options 138
- Information Sub Tab 139
- Finding Weather Information 140
- Marine Weather Bulletins 141
- Marine Weather Bulletin 141
- SettInG up and uSInG Sonar 142
- Using the Sonar Page 143
- Adjusting the Sonar Page 144
- Resizing the Split Screen 146
- Setting Up the Sonar Page 147
- Calibrating the Water Speed 148
- Setting Up the Sonar Display 149
- 20' 150
- 10' 150
- Transducer Coverage 151
- Whiteline 152
- Thermoclines 152
- Reset the Temperature Graph 153
- 3,500 ft 154
- 3,000 ft 154
- TIS Limitations 155
- IMItAtIons 156
- TIS Symbology 157
- Trafc Ground Track 158
- Trafc Warning Window 158
- Intruder Aircraft 160
- + 500 ft 160
- This area within 34 seconds 160
- - 500 ft 160
- Specications 162
- Care Information 163
- Optional Accessories 164
- Installation Information 165
- GXM 30/30A Antenna Plugged In 166
- Interfacing 168
- Removing the GPS Antenna 169
- Learning About GPS 170
- What is WAAS/EGNOS? 171
- LORAN TD Setup 172
- What are Map Datums? 174
- What is a Location Format? 174
- Jeppesen Database Information 177
- Messages 178
- PPendIX > MessAges 179
- Data Field Options 181
- Software License Agreement 183
- Product Registration 183
- Contact Garmin 183
- Limited Warranty 183
- Weather Data Warranty 184
- FCC Compliance 186
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