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. [. . . ] · Movements: This function makes it possible to estimate the position of a tracked school at a given time. · Track window: This command enables you to adjust the size of the window the sonar places on the chosen target. A larger track window will enable the system to track a large target more easily, but the system will be more susceptible to background noise. Smaller targets may be ignored if there is a lot of noise in the area, as the system will track the strongest echo within the track window. · Wind direction: The wind marker is show in the outer area of the echo presentation as a white arrow. This arrow can be manually adjusted for indication of the wind or current direction, or automatically show the wind direction if a wind sensor is connected. · Wind speed: This is not a parameter. It is only a read-out of the current wind speed providing that a wind sensor is connected. · Sort modes: Click to access the Sort Modes menu. This menu is used to select the display modes to be activated by the four Mode buttons on the Sonar Operating Panel. The four upper display modes in this menu will always be the four modes provided by the four Mode buttons in the order they are sorted. 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 Gain button to adjust the gain. · Click the left side of the button to decrease the gain. · Click the right side of the button to increase the gain. · 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. 1 2 Click the Horizontal or Vertical tab to open the respective menu. Click the RCG button to adjust the parameter. · Click the left side of the button to decrease the parameter value. [. . . ] Other typical noise sources on board your vessels are winches, refrigerating plants, power generators, pumps and cranes. If you experience problems you think are caused by noise, try to find out which system that causes the noise, and contact your dealer for advice. Cavitation As the propeller blades move through the water, low pressure areas are formed as the water accelerates around and moves past the blades. The faster the blades move, the lower the pressure around it will become. As it reaches vapour pressure, the water vaporizes and forms small bubbles of gas. [. . . ]