It will work fine. It is a bit hard on the batteries. The backlight is part of the problem, if you go with less bright backlight it will lengthen the run time. I brought along an extra battery. I was using the HDS 7 a couple of years ago, but have since switched over to a Vexilar FL 28. I am thinking about installing the HDS 7 on my Skidoo snowmobile for the GPS lake map capability...find those structures I have located in the summer (also find my way home in a blizzard). PS I have n Lowrance Iceducer that I could part with...
bestfishes - jim