Furuno GD-1700C - Manual (Page 7)

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3.22 Guard Alarm ..............................................................................................................................3-30
3.22.1 Setting a guard alarm zone ..........................................................................................3-30
3.22.2 When the alarm is violated… .......................................................................................3-31
3.22.3 Cancelling the guard alarm ..........................................................................................3-31
3.23 Watchman .................................................................................................................................3-32
3.23.1 How watchman works...................................................................................................3-32
3.23.2 Turning on/off watchman ..............................................................................................3-32
3.23.3 Setting watchman stand-by interval .............................................................................3-32
3.24 Waypoint Marker .......................................................................................................................3-33
3.25 ARP, TTM Operation .................................................................................................................3-34
3.25.1 Activating/deactivating ARP, TTM.................................................................................3-35
3.25.2 Acquiring and tracking targets (ARP) ...........................................................................3-36
3.25.3 Displaying target number (ARP, TTM)..........................................................................3-37
3.25.4 Terminating tracking of ARP targets .............................................................................3-38
3.25.5 Setting vector attributes (ARP).....................................................................................3-39
3.25.6 Displaying past position display (ARP).........................................................................3-40
3.25.7 ARP, TTM target data ...................................................................................................3-41
3.25.8 CPA/TCPA alarm (ARP) ...............................................................................................3-42
3.25.9 Lost target alarm (ARP)................................................................................................3-43
3.26 Interpreting the Radar Display ..................................................................................................3-44
3.26.1 General .........................................................................................................................3-44
3.26.2 False echoes ................................................................................................................3-46
3.26.3 SART (Search and Rescue Transponder)....................................................................3-48
3.26.4 Racon (Radar Beacon).................................................................................................3-50
4. VIDEO SOUNDER OPERATION ........................................................................... 4-1
4.1 Principle of Operation..................................................................................................................4-1
4.2 Sounder Displays ........................................................................................................................4-2
4.2.1 Selecting a sounder display ...........................................................................................4-2
4.2.2 Description of sounder displays .....................................................................................4-3
4.2.3 Selecting screen split method in combination displays ..................................................4-7
4.3 Automatic Sounder Operation.....................................................................................................4-8
4.3.1 How the automatic sounder works .................................................................................4-8
4.3.2 Types of automatic sounder modes ...............................................................................4-8
4.3.3 How to enable automatic sounder operation..................................................................4-8
4.4 Manual Sounder Operation .........................................................................................................4-9
4.4.1 Selecting the manual mode ............................................................................................4-9
4.4.2 Selecting display range ..................................................................................................4-9
4.4.3 Adjusting the gain ...........................................................................................................4-9
4.4.4 Range shifting...............................................................................................................4-10
4.5 Measuring Depth, Time ............................................................................................................. 4-11
4.6 Reducing Interference...............................................................................................................4-12
4.7 Reducing Low Level Noise........................................................................................................4-13
4.8 Erasing Weak Echoes ...............................................................................................................4-14
4.9 White Marker (GD-1700C/1710C) ............................................................................................4-15
4.10 Picture Advance Speed .............................................................................................................4-16
4.10.1 Advancement independent of ship's speed..................................................................4-16
4.10.2 Advancement synchronized with ship's speed.............................................................4-17