User manual SIMRAD SUPPORT BEAM DRILLING TEMPLATE SCHEMA REV A

[. . . ] Simrad AS endeavours to ensure that all information in this document is correct and fairly stated, but does not accept liability for any errors or omissions. Warning The equipment to which this manual applies must only be used for the purpose for which it was designed. Improper use or maintenance may cause damage to the equipment and/or injury to personnel. The user must be familiar with the contents of the appropriate manuals before attempting to operate or work on the equipment. [. . . ] · Colour threshold: Click this button to control how many colours to use in the echo presentation. · Panel backlight: This function controls the intensity of the back light in the Sonar Control Panel. · Mode buttons: Use this button to choose how the Mode buttons on the Sonar Control Panel shall work. You can either choose between the four most frequent modes, or the four most frequent user settings. · Cosmetics: Click to access the Cosmetics menu, which allows you to control the amount of support information on the sonar picture. · Bearing: Set up the sound channel bearing to be relative or related to true north. · Menu: Choose if you wish to see the complete menus (as described here), or just the most important settings. Setup menu The Setup menu is shown in all display modes, and gives access to parameters controlling the processing and algorithms in the sonar system. It also provides access to specific system parameters and functions such as Test and Store/Recall. · Store/Recall: Click this button to record and playback sonar images. · Test: Click this button to access the sonar's test software. These utilities are only provided for certified service technicians, and they are not documented. Click the Full screen: On button. In order to restore the previous menu location: How to simplify the menu You can easily reduce the number of buttons on the sonar menus. · Click the left side of the button to scroll down the list of settings. · Click the right side of the button to scroll up the list of settings. · Click the middle of the button to open the parameter dialogue (recommended). 3 In the parameter dialogue, select the menu level you wish to use. Gain adjustment procedures This section explains how to control the manual and automatic gain settings on the SUPPORT BEAM DRILLING TEMPLATE sonar. 302656/A 21 Simrad SUPPORT BEAM DRILLING TEMPLATE How to adjust the gain You can adjust the sonar gain by means of the control buttons on the Sonar Control Panel, or by using the Gain button on the Horizontal and Vertical menus. Using the Sonar Control Panel: 1 2 3 Locate the Gain field on the Sonar Control Panel. Press the Gain H+ or Gain H- to increase or decrease the horizontal gain. Press the Gain V+ or Gain V- to increase or decrease the vertical gain. Using the menu system: 1 2 Click the Horizontal or Vertical tab to open the respective menu. · Click the middle of the button to open the parameter dialogue. How to control the RCG The RCG (Reverberation Controlled Gain) regulates the receiver gain individually for each of the receiving beams. If you select Weak and Medium, echoes from propellers, surface and bottom reverberations will be suppressed, while target echoes will remain in view. If you select Strong, a special filter removes the bottom, while echoes on the bottom will be presented. Note Scattered fish can be perceived as reverberation. The RCG function should therefore be used with care if scattered schools are to be detected. [. . . ] The upper school in the illustration will appear on the sonar picture before the bottom echo, while the lower school will easily be disguised by the bottom echoes. Once again you can activate the RCG function to improve the reading. Noise and reverberation Every time you use the sonar the quality of your search operations will depend on numerous error sources caused by the natural environment and physical properties of your vessel. · Noise is generated by the vessel: engine, propellers, winches, refrigerating plants etc. · Reverberation is caused by natural conditions in the sea: temperature, salinity, sea state and bottom conditions. 302656/A 33 Simrad SUPPORT BEAM DRILLING TEMPLATE The most common cause of acoustic noise is the propeller and the cavitation caused by its rotation. [. . . ]