GP1670F_1870F Operator's Manual - Furuno USA

7.14.1 How to set an alarm7. FISH FINDER OPERATIONS1. Open the [ALARMS] menu and select [FISH ALARM], [FISH ALARM (B/L)], [FISHSIZE ALARM] or [BOTTOM TYPE ALARM]. An alarm setting window appears.OffDepth 0.0 ftRange 5 ftFish Alarm,Fish Alarm (B/L)OffMin: 5 inchMax: 199 inchFish Size AlarmProbability 70Bottom Type Alarm2. For the alarms other than [BOTTOM TYPE ALARM], select [On] on the first lineof the alarm setting window.3. Do one of the following depending on the alarm selected at step 1.[FISH ALARM], [FISH ALARM (B/L)]: Set the start depth with [Depth]. Set thealarm range with [Range]. See the figure below for details.SurfaceAlarm Range[Depth](from sea surface)[Range]AlarmRange[Range][Depth](from bottom)BottomFishAlarmFish Alarm for Bottom Lock[FISH SIZE ALARM]: Set the minimum and maximum lengths at [Min] and [Max].[BOTTOM TYPE ALARM]: Set the alarm referring to the illustration shown below.Select the type of bottom forwhich you want to be alerted.Set the percentage ofprobability (50-90%)that triggers the alarm.7.14.2 How to select the echo signal level that triggers the fish alarmYou can specify the echo signal level that triggers the fish alarm. Open the [ALARMS]and [FISH ALARM LEVEL] menus. Select [High], [Medium] or [Low] as appropriate.7-15