User manual SIMRAD ITI TWIN RIG QUICK REFERENCE GUIDE REV A

[. . . ] QUICK REFERENCE GUIDE ITI Twin rig operation Purpose This guide provides general information on how to use the Simrad ITI and its appropriate sensors in a twin rig configuration. The functionality described in this document is only valid with ITI SW version 5. 30 and later. Language The menu language is set from the main menu using this command sequence: System setup Language Trawl setup The mode is changed to Twin rig by the following command sequence: Main menu System setup Trawl setup Trawl gear Dual. [. . . ] VIEW SPREAD1 SPREAD2 OFFSET FILTER 30m 8m BOTTOM DUAL OFF 45m 45m 0. 0m 0 view is switched off, or there is no depth sensor on the trawl, the slant range will be presented instead. Active sensors The sensors to be used on the trawl are chosen using this command sequence: Main menu Active sensors Sensors that are not in use, or have no battery power, should be switched off in order to maintain the desired the update rate. Example: A sensor setup for twin rig would include the following sensors: Two Spread sets, two Temp/Depth, Trawl eye and Catch 1&2&3. ACTIVE SENSORS TEMP-DEPTH GRID HEIGHT HEIGHT2 SPREAD1 SPREAD2 TRAWL EYE CATCH CATCH AVAIL TEMP-DEPTH HEIGHT2 SPREAD1 SPREAD2 TRAWL EYE CATCH 1 CATCH 2 CATCH 3 1:1 OFF OFF 1:1 1:1 1:1 1:1 1:3 1&2&3 CENTER STARB PORT STARB PORT PORT STARB STARB All sensors must be fitted correctly to the trawl. The Spread 1 & 2, Temp/Depth, Trawl eye and Height 2 sensors must be set to an update rate of 1:1. Choosing Catch 1&2&3 in the same menu must correspond to the actual sensors placed on the trawl. The update rate of the Catch sensors is then for example set to 1:3 for update every third interrogaton lap. On which trawl the different catch sensors are fitted (port or starboard) are thereafter set in the same menu. Update rate When the sensors are correctly set up, they can be turned on using the following command sequence: Main menu Rate On This sequence controls the complete system's update rate. With the rate set to maximum, the update speed will only depend on the number of sensors in use. When the rate is switched off, all transmitters in the system will be inactive. RATE MAX 0. 5 MIN 1. 0 MIN 1. 5 MIN OFF 857-165137 / Rev. A / February 2005 Max range In order to achieve the best possible update rate, the maximum range to the trawl is set using the following command sequence: Main menu System setup Max range You can choose any value between 400 and 4000 meters. If this range is set too low, the communication with the sensors beyond this distance will cease. If it is set too high, the system might use more time than necessary searching after sensors. MAX RANGE 2500m typically be the Depth/Temp, Spread 2, Height 2 and Catch 3 sensors. Notice that the Spread 1 sensor is set to port in the same menu (if it is used). Set the mode to Single trawl using the following command sequence: Main menu Trawl setup TrawlGear Single When you shoot the trawl, do remember to turn the rate on. Changing from single to twin Move the sensor Spread Remote 1 from the starboard door to port side of the clump. Set the mode to Dual using the following command sequence: Main menu Trawl setup TrawlGear Dual Activate all the sensors using the following command sequence: Main menu Active sensors Sensors in use will typically include the Depth/Temp, Spread 2, Height 2, and Catch 3 sensors. [. . . ] This is the sensor placed in port side of the clump during twin trawling. Using the sensors menu, deactivate the sensors that are no longer in use. This will A B (CD11036B) www. simrad. com MAXIMIZING YOUR PERFORMANCE AT SEA [. . . ]