go GPS
Radar is hard to set up and have work well on sail boats, especially small sail boats. I have several hand held GPS's and one mounted GPS in my power boat. On the Macs the best seems to be my Lowrance H20c. It will hook upwith an auto pilot, and or a dcs vhf radio. Has color charts. The whole US and northern carribian chart package only costs $99, un like the $99 a section you get with the garman products. Has a good built in base map, I use traveling all over the US. Even the base map charts are good enough for most sailing. It gets good battery life (12 hours on 2 AA) and comes with the power cord to plug into a 12V plug (cigarette lighter plug). A GPS can help keep you in the channel, and help from not being able to get bearrings, but I still keep a DR on paper charts too. Just have to use my ears for collision avoidance with other vessels, and sound the proper signals my self. Do check out the Lowrance products before dropping your hard earned bucks on the Garman, I think you will find you get a lot more bang for the buck. The cheapest place I have found the Lowrance (Garman too) is at Caballas sporting goods stores.