3.3.4 Alarm Display, Stopping of Alarm Sound and Adjusting volume ..................... 3-13 
3.3.5 Setting of Display Color in Shoal of Fish Image and Echo Graph ................... 3-13 
3.3.6 Eliminating Interference ................................................................................. 3-14 
3.3.7 Assistance of Setting ....................................................................................... 3-14 
3.3.8 Simple Setting and Reference Value of Measurement Setting ......................... 3-14 
4. OPERATION ................................................................................................................ 4-1 
4.1 MEASUREMENT SETTING AND CURRENT DISPLAY ...................................................... 4-3 
4.1.1 Bearing Display ................................................................................................ 4-3 
4.1.2 Direction Standard ............................................................................................ 4-4 
4.1.3 Absolute Current Standard ............................................................................... 4-5 
4.1.4 Relative Current Standard. ............................................................................... 4-5 
4.1.5 Ship Speed Display ........................................................................................... 4-6 
4.1.6 System Mode   ................................................................................................... 4-6 
4.1.7 Trip/Timer ......................................................................................................... 4-7 
4.1.8 Alarm and Graph Setting .................................................................................. 4-7 
4.1.9 Maximum Depth to Search ............................................................................... 4-9 
4.1.10 Bottom Lock Mode ........................................................................................... 4-9 
4.1.11 BTM Adjustment ........................................................................................... 4-10 
4.1.12 Transmitting Power....................................................................................... 4-10 
4.1.13 Transmitting Pulse Width: S-short/Shot/Normal/Long .................................. 4-10 
4.1.14 Tide Process .................................................................................................. 4-11 
4.1.15 Shallow Water Mode ...................................................................................... 4-11 
4.1.16 Mode.............................................................................................................. 4-12 
4.1.17 BT・WT・Tide Average time 1 ...................................................................... 4-12 
4.1.18 BT・WT・Tide Average time 2 ...................................................................... 4-12 
4.1.19 BT・WT Average time 3 .............................................................................. 4-132 
4.1.20 Tide Response Time 1 .................................................................................... 4-13 
4.1.21 Tide Response Time 2 .................................................................................... 4-13 
4.1.22 Filter Setting 1 .............................................................................................. 4-14 
4.1.23 Filter Setting 2 .............................................................................................. 4-14 
4.1.24 Filter Setting 3 .............................................................................................. 4-15 
4.1.25 Filter Setting 4 .............................................................................................. 4-15 
4.1.26 Filter Setting 5 .............................................................................................. 4-15 
4.1.27 Filter Setting 6 .............................................................................................. 4-15 
4.1.25 Switch Speed ................................................................................................. 4-17 
4.2 CURRENT DISPLAY SETTING ................................................................................... 4-18 
4.2.1 Current Circle Graph Setting .......................................................................... 4-18 
4.2.2 Current Echo Graph Setting ........................................................................... 4-19 
4.2.3 Current Measurement Layer Depth Setting ................................................... 4-22