User manual NAVMAN FISHFINDERS FISH 4600

[. . . ] F I TRACKFISH /4600 S H 4 5 0 0 6600 CHA RTPLOTTER AND FISHFINDERS FISHFINDER Installation and Operation Manual English . . . . . . . . . . . . . . . . . 75 www. navman. com NAVMAN This is the Installation and Operation manual for the Navman FISH 4500 and FISH 4600 (here after referred to as FISH 4500/4600) ¿sh¿nders. The FISH 4500/4600 is set up with default units of feet, °F (Fahrenheit), US gallons and knots. See section 3-6 Setup > Units, to change the units. FCC Statement Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. [. . . ] It will be much easier to see fish arches when using zoom mode to concentrate on a particular section of water, rather than just displaying everything from the surface to the bottom. Zooming increases screen resolution and is necessary for good fish arches. · It is difficult to get fish arches in shallow water as the transducer sonar beam is very narrow near the surface and fish do not stay within the beam long enough to display an arch. Several fish in shallow water tend to display as randomly stacked blocks of pixels. · Wave motion may result in distorted fish arches. 19 Fish symbols The fish symbol can be customized or switched off altogether so that the echoes are not converted to fish symbols on the display. The differences between Fish symbol On and Off are: Fish symbols On Using Navman's SBN-II sonar technology the fishfinder analyses all echoes and eliminates most false signals and clutter so that remaining targets are most likely fish. Depending on the strength of the remaining echoes, they are displayed as either small, medium or large fish symbols - with or without depth. While the SBN-II processing is very sophisticated it is not foolproof - there will be times when the fishfinder will not be able to differentiate between large air bubbles, rubbish containing air, fishing floats etc. The following picture shows the Sonar display with the Fish symbol: On + depth: FISH 4500/4600 Installation and Operation Manual NAVMAN 4-4 Gain Gain (sensitivity) controls the amount of detail displayed on the FISH 4500/4600. Understanding how to set suitable Gain settings is important for optimum performance. The Navman fishfinder has two gain modes, Auto Gain and Manual Gain. Normally the best results are obtained in Manual Gain, but practice and experience are required to obtain the optimum settings for different conditions. Therefore, the use of Auto Gain is strongly recommended when learning to use the fishfinder or when travelling at speed. · In Auto Gain, the gain adjusts automatically to compensate for water depth and clarity. · In Manual Gain, the gain can be adjusted by the user to compensate for water depth and clarity. High Gain settings may amplify the normal background noise until it appears as random pixels. Note: The Gain mode automatically changes to Manual Gain if the gain or threshold settings are adjusted by the user Obtaining the best results To obtain the best detection capability for both fish and bottom we recommend the use of the Sonar A-Scope display: 1. Adjust the gain until the threshold line is just to the right of the unwanted noise. Changing between Auto and Manual To change between Auto Gain and Manual Gain: 1. Use the or cursor keys to highlight Auto or Manual, then use the or cursor keys to select the required mode. Gain Threshold line Unwanted signal Adjusting Gain and Threshold settings The gain settings and the threshold settings can be adjusted independently for each frequency (50kHz and 200 kHz). Use threshold to eliminate colors in the sonar display. Use the or cursor keys to highlight the desired setting, then use the or cursor keys to change it. Gain line 20 NAVMAN FISH 4500/4600 Installation and Operation Manual 4-5 Range Range is the vertical depth displayed on the FISH 4500/4600. The Navman fishfinder has two range modes, Auto Range and Manual Range: · In Auto Range, the fishfinder adjusts the depth range automatically so the bottom is always shown in the lower part of the display. The use of Auto Range is recommended for normal conditions. [. . . ] #604-842, 2F, 1118-15, Janglim1-Dong, Saha-Gu, Busan, Korea. Ph: +82 51 293 8589 Fax: +82 51 265 8984 e-mail: info@kumhomarine. com web: www. kumhomarine. com Maldives Maizan Electronics Pte. Mobile: +960 78 24 44 Ph: +960 32 32 11 Fax: +960 32 57 07 e-mail: ahmed@maizan. com. mv Singapore and Malaysia, Brunei, Indonesia and Phillipines RIQ PTE Ltd. Blk 3007, 81 Ubi Road 1, #02-440, Singapore 408701. [. . . ]