I have noted in the HP Discussion Forums that several listeners, like myself, would like to have the recreational marine frequencies added and, to date, nothing. I reside in SE Florida and there have been several rescues of boaters as a result of people monitoring these calls. I, too, bought the HP because I'm not computer literate and don't wish to get involved with software to add frequencies. I hope this issue is addressed soon and not blamed on the fact that these frequencies don't exist in RR. As far as the HP unit is concerned, I love it!
Try making a favorites list using Barnstable County in Mass and Nassau County New York. Both those areas are near the water and have Coast Guard freqs. I found that the Coast Guard in my area uses some of the same freqs.
You could also spend $30 and download a software program called ARC Patrol. This software allows you to add any freq within range of the HP and it will also let you customize the data tags.