These are installed dual station connected by hard wire. Since i had a software fault last year in which the enter button command was freezing up,it was repaired by Furuno. The fault was repaired and all the settings put back to 'default'. Everything seemed ok except the radar display was reading back to front. The instrutions in the manual does not match the new software settings,and now not only is one unit not 'talking' to the other i cant get the lower unit out of simulation mode for both the plotter and radar, or read any info. of the chart cartridge. Can anyone rec. someone near the Hamble that can reprogram my system ? The installers Maricom are busy until July. Thanks.