Free Download - MaxSea 7.3.5- 13,53 Mb. "Medicine" and instructions on installation in a file " MaxSea Installation ". It's tested on different vessels - ОК. MaxSea 10.1.3.2 - The convenient interface, is added many new opportunities. You can find and download it from Russian part of this site. It's tested on different vessels - ОК.
I advise and recommend to buy portable GPS receivers, with USB connection which appears on sale more and more.
You can download the instruction for ajustment MaxSea 10.1.3.2 for work with such GPS receiver - 51 Kb.
Russian