Fish Id Sensitivity; Real Time Sonar (Rts®) Window; Zoom Width; 83 Khz Sensitivity (Advanced) - Humminbird 727 Operation Manual

531425-1_D - 727 Man_English.qxd

Fish ID Sensitivity

Fish ID Sensitivity adjusts the threshold of the Fish
ID+ TM detection algorithms. Selecting a higher setting allows weaker returns to be
displayed as fish. This is useful for identifying smaller fish species or baitfish.
Selecting a lower setting displays fewer fish from weak sonar returns. This is helpful
when seeking larger species of fish. Fish ID Sensitivity is used in conjunction with
Fish ID+ TM . Fish ID+ TM must be On for Fish ID Sensitivity to affect the ability of the
Fishing System to identify sonar returns as fish.
To change the Fish ID Sensitivity setting:
1. Highlight Fish ID Sensitivity on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Fish ID
Sensitivity setting. (Low = 1, High = 10, Default = 5)
Real Time Sonar (RTS®) Window
RTS® Window sets the RTS® Window to either Wide or
Narrow, or turns it off in the Sonar View. The RTS® Window always updates at the
fastest rate possible and only displays returns that are within the transducer beam.
(See Real Time Sonar (RTS®) Window for additional detail).
RTS® Window (Wide) RTS® Window (Narrow)
To change the RTS® Window setting:
1. Highlight RTS Window on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the RTS® Window
setting. (Wide, Narrow, Off, Default = Wide)
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RTS® Window (Off)
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Zoom Width

Zoom Width adjusts the width of the Zoom window on
the Sonar Zoom View.
To change the Zoom Width Setting:
1. Highlight Zoom Width on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Zoom Width
setting. (Narrow, Medium, Wide, Default = Wide)
83 kHz Sensitivity
(Advanced)
83 kHz Sensitivity changes the sensitivity of the 83 kHz beam. Increasing the 83 kHz
Sensitivity will display additional weak returns and decreasing the 83 kHz Sensitivity
will display fewer weak returns. The 83 kHz Sensitivity menu choice is only available
when User Mode is set to Advanced (see Setup Menu Tab: User Mode).
NOTE: 83 kHz Sensitivity is particularly useful for adjusting the sensitivity of the 83 kHz
sonar returns in the 200/83kHz Split Sonar View. The 83kHz sensitivity can be adjusted
without affecting the sensitivity of the 200 kHz returns shown in the 200 kHz sonar
window.
To set the 83 kHz Sensitivity:
1. Make sure you are in Advanced User Mode, then highlight 83 kHz Sensitivity
on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to set the 83 kHz
Sensitivity. (-10 to +10, Default = 0)
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