User manual GARMIN FISHFINDER 250

[. . . ] Fishfinder 250/250C high-resolution sonar owner's manual (Fishfinder 250C shown) © Copyright 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street Olathe, Kansas 66062, U. S. A. 913/397. 8200 or 800/800. 1020 Fax 913/397. 8282 Garmin (Europe) Ltd. [. . . ] This provides some flexibility in what is seen on the display. To see more detail, increase the receiver sensitivity by selecting 18 a higher gain percentage. If there is too much detail or if the screen is cluttered, lowering the sensitivity may increase the clarity of the display. Bar represents area shown on 2x view · Target Level--adjusts which colors (Fishfinder 250C) or shades of gray (Fishfinder 250) are used to display sonar information. A Color Bar (page 23) is displayed on the right side of the screen as you adjust this setting. A higher percentage results in more strong-signaled colors or shades (page 15) displayed on the Sonar page. A lower percentage results in more weaker-signaled colors or shades (page 15) displayed on the Sonar page. This setting does not increase/ decrease the unit Gain. · Whiteline--controls how the unit displays information about the bottom type (hard or soft). When turned Off, all highintensity bottom returns are displayed as red on the Fishfinder Sonar view adjustment Fishfinder 250/250C Owner's Manual BASIC OPERATION > USING THE ADJUSTMENT MENU · · · · 250C and black on the Fishfinder 250. When set at Normal or 1-100%, this option can be used to better determine bottom hardness. See page 34 for more information on this feature. Frequency--allows you to choose a sonar operation frequency. The frequency is the "pitch" of the sound that the transducer sends and receives. You may choose 200kHz, 50kHz, or Dual frequency (when using a dual frequency transducer). Depth Line--adds a horizontal depth line across the display to measure the depth of underwater objects. The depth of the line is displayed in a box on the right side of the line. When the Depth Line adjustment window is visible, press the Up or Down ARROW keys to control the position of the line on the graph. Noise Reject--helps filter unwanted noise from the graph. This option can be turned Off, set to Normal (automatically adjusts for optimum viewing), or set to a fixed 1-100% setting. Higher noise rejection settings make the unit less likely to show fish or structures. Scroll--adjusts the rate that the graph scrolls from right to left. If you are sitting still or the graph is moving too fast, slowing the scroll rate or pausing it can be beneficial. [. . . ] Garmin retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY. To obtain warranty service, contact your local Garmin authorized dealer or call Garmin Product Support for shipping instructions and an RMA tracking 38 Fishfinder 250/250C Owner's Manual APPENDIX > LIMITED WARRANTY number. The unit should be securely packed with the tracking number clearly written on the outside of the package. [. . . ]