I have run the Furuno 1622 & 1623 and now a Simrad unit. When you navigate through fog you will more than likely have the unit set at 1/4 mile to 3 mile range. I also found these units to be dead on accurate up to about 8 miles. For this you do not need a 4 kw unit the cheaper units such as the Furuno units do a great job. Now if you are running offshore and need the range and power to find birds, or spot where the fleet may be fishing the higher end models may be your ticket
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