User manual LOWRANCE LCX-17M

[. . . ] 988-0151-291 www. lowrance. com LCX-17M Fish-finding Sonar & Mapping GPS Installation and Operation Instructions Copyright © 2004 Lowrance Electronics, Inc. No part of this manual may be copied, reproduced, republished, transmitted or distributed for any purpose, without prior written consent of Lowrance Electronics. Any unauthorized commercial distribution of this manual is strictly prohibited. Lowrance is a registered trademark of Lowrance Electronics, Inc. NMEA 2000 is a registered trademark of the National Marine Electronics Association, Inc. eXitSource Database, copyright 2001-2004 Zenrin Co. [. . . ] The Keel Offset feature eliminates the need for the navigator to mentally calculate how much water is under his keel. Keel Offset lets you calibrate the digital depth: chart depth scale, chart cursor depth and fish symbol depth displayed on the screen. To calibrate the depth indicators, first measure the distance from the face of the 80 transducer to the lowest part of the boat. This will entered as a negative 3. 5 feet, which makes the depth indicators perform as if the transducer's lower in the water than it really is. Press to the second number, then press to change the number to 5, then press EXIT. The depth indicators now accurately show the water depth beneath the keel. NOTE: If knowing the exact depth of water beneath the keel is less important, you can calibrate the depth indicators so that they show the actual water depth from surface to bottom. To do this, first measure the distance from the face of the transducer to the surface (the water line on the boat). This will be entered as a positive 1. 5 feet, which makes the depth indicators perform as if the transducer's higher in the water than it really is. The Keel Offset dialog box appears with a plus (+) sign at the front of the box. Press to the second number, press to change the number to 5, then press EXIT. The depth indicator now accurately shows the water depth from surface to bottom. Sensitivity & Auto Sensitivity The sensitivity controls the ability of the unit to pick up echoes. A low sensitivity level (from zero to 50 percent) excludes much of the bottom information, fish signals, and other target information. High sensitivity levels let you see this detail, but it can also clutter the screen with many undesired signals. Typically, the best sensitivity level shows a good solid bottom signal with some surface clutter. 81 Automatic Sensitivity The default sensitivity mode is automatic. When the unit is in the automatic mode, sensitivity is automatically adjusted to keep a solid bottom signal displayed, plus a little more power. However, situations occur when it becomes necessary to increase or decrease the sensitivity. This typically happens when you wish to see more detail, so an increase in sensitivity is indicated. Or, wave action and boat wakes create enough tiny air bubbles to clutter much of the water column. In that case, a decrease in sensitivity is indicated to reduce some of the clutter. The control bar used to adjust sensitivity up or down is the same whether the unit is in the automatic or manual mode. [. . . ] If you're in the United States and you have technical, return or repair questions, please contact the Factory Customer Service Department. Before any product can be returned, you must call customer service to determine if a return is necessary. Many times, customer service can resolve your problem over the phone without sending your product to the factory. To call us, use the following toll-free number: 800-324-1356 8 a. m. [. . . ]