Just bought my first fish-finding sonar and mapping GPS and it doesn't work right! Last Saturday I took it out on the river and it kept freezing up and not reading depths. I could not read the returns when it was not frozen. I called the Company (Lowrance) Monday and asked them what was going on with it. They asked if I was trying to chart shallow water. I said 8 to 30 feet and that it locked up at 9 and 11 feet. Their answer was that it "was fine" however, I MIGHT need to up load the new program they have. I asked why I paid over 1000.00 for a new product and it had to be upgraded. "It my have the older program loaded". I could go to the web site and down load the program to a reader/writer then up load it to my BRAND NEW sonar unit. I do not have a reader/writer so for a small fee, I could have it mailed to me to up load, BUT I would have to send it back. Why do I have to pay for your poor programing? We can not afford to pay for all the shipping. I would have to say that I will never buy a Lowrance product again. Oh by the way I have a like new LCX27c for sale. I had to wait about 20 minutes to talk to someone on their 800 line, during the wait their recorded message said that it was better for people to go to their website as they have thousands of calls coming in each day to their customer service center. I thought? MMMMMM if they are answering thousands of calls a day, they must be putting out an awful lot of junk products. My suggestion is to do some in depth research before buying a sonar unit. I am sure that the boat mechanic that installed the unit did not know what he was doing either. I asked him about the shut off switch for the satellite antenna and he did not know you needed one. You do, or the antenna stays on all the time and runs your battery down. My question is: Can any one of you help me with this problem?