Follow up: I just ordered a new Standard Horizon HX870 for ~$210
The HX851 cannot be found (in stock) for less than ~$150.
It seems to be a major improvement over the old HX851, and will enable me to teach on various boats, and still know that I have an accurate GPS, and the ability to send a DSC distress call. I think that the enhanced battery capacity (over the 851), should address my concern over working time... Now, if they could only address the price issue....
The HX851 cannot be found (in stock) for less than ~$150.
It seems to be a major improvement over the old HX851, and will enable me to teach on various boats, and still know that I have an accurate GPS, and the ability to send a DSC distress call. I think that the enhanced battery capacity (over the 851), should address my concern over working time... Now, if they could only address the price issue....