User manual SIMRAD TRANSCEIVER UNIT OUTLINE SCHEMA REV A

[. . . ] The information contained in this document is subject to change without prior notice. Simrad AS shall not be liable for errors contained herein, or for incidental or consequential damages in connection with the furnishing, performance, or use of this document. 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 or injury to personnel. [. . . ] If you install both trawl and purse seine hydrophones, do not confuse the two types. The Trawl hydrophones are marked with order number 314-205250, while the Purse seine hydrophones are marked with order number 314-202275. Other well-founded information or experience regarding hydrophone installation be available should also be evaluated even though not directly mentioned in these instructions. 11 12 13 14 15 16 17 18 19 20 21 851-165187 / Rev. A 87 Simrad TRANSCEIVER UNIT OUTLINE Optimal location of trawl hydrophones The most influential factors effecting hydrophone reception common to most vessels are: · Noise from cavitation generated by the main propeller. · Air bubbles in the water around the hydrophone which impede acoustic signals. · Noise from other acoustic equipment mounted in close proximity. If the shipyard or persons responsible for placement and mounting the hydrophone(s) have knowledge and the proper experience with installation of similar equipment, it should be fully exploited when deciding where to locate the hydrophones. This also holds true for adjusting the degree to which a hydrophone should be tilted with regard to the both the vessel's physical characteristics and fishing method. Proper hydrophone installation can increase overall system performance more than any other single factor and therefore it is important that all the variables involved be understood and taken into account. Often, individual hydrophone installation requirements contradict one an other and only an in-depth knowledge of the principles involved can aid in deciding which should be given priority. General rules-of-thumb Although individual vessel vary greatly with regard to physical construction and fishing methods, the following rules of thumb apply under most circumstances. · Hydrophones should be located as far forward as possible, normally one-third the length of the water-line from the bow. · If a vessel has a bow thruster, bubbles generated by its tunnel can block sensor signals. To maximise coverage using two hydrophones when 851-165187 / Rev. A 89 Simrad TRANSCEIVER UNIT OUTLINE trawling in both deep and shallow water tilt one preferably 15 degrees and the other preferably 30 degrees. The hydrophone closes to the propeller should be tilted the most and care should be taken with regard to underwater acoustical noise. · Hydrophone cables pass through a vessel's hull below its water-line. It is therefore strongly recommended that a length of conduit be fitted (using approve fastening procedures) to the interior of hull around the opening made for the hydrophone's cable. This conduit should extend vertically (inside the vessel) over the water-line so that hydrophone cables can be safely passed through the hull without the danger of flooding in the event of gland failure. Hydrophones with steel through-hull fittings installed in this manner can be replaced without the necessity of dry docking. · The cable between the hydrophone and the cabinet must be properly shielded from other potential sources of electrical interference. A good practice is to run the hydrophone cable in a steel conduit to the wheel house. Figure 2 Recommended hydrophone locations The illustration shows the recommended (A) and the alternative (B) locations for single hydrophone locations. For a dual installation, use position (A), and place the port hydrophone further aft than the starboard. (L) is the total length of the hull measured at the waterline. 90 851-165187 / Rev. A Trawl hydrophone installation Coverage area, orientation and tilt Once the fore-and-aft placement of the hydrophone is decided, it is equally important to carefully consider its horizontal and vertical orientation. Hydrophone orientation can have a large influence on system performance. [. . . ] - When a new software version is released, it will always have a higher number. Prerequisites In order to upgrade the MMI software, you will need the following tools and equipment: · A personal computer (desktop or laptop) with operating system Microsoft® Windows 2000® or Windows XP® and with a 9-pin serial line connector. 880-281037) Note that the MMI software upgrade file includes an upload program that will run on your computer. The program file The MMI software upgrade file is provided on the following format: 281037xx MMI Vyzz. exe · 281037 is the last part of the order number, and Simrad's internal identification number for this software. · . exe means that the upgrade file is on executable format. 851-165187 / Rev. A 199 Simrad TRANSCEIVER UNIT OUTLINE Procedure In order to upgrade the MMI software, observe the following procedure. Connect the upload cable between a serial line connector on the computer and the NMEA2 connector on the rear side of the TRANSCEIVER UNIT OUTLINE Operator Unit. [. . . ]