Good morning. I was thinking of buying a digital depth meter for my present sailboat. I never really worried about not having one before because I had a swing keel on previous boat and used it as a depth gauge. I keep an eye on the charts and if I touch I would just pull up the swing keel and turn around. I now have a fixed keel and that option is out. I am considering getting a "fish finder" that will give me depth and also GPS navigation. I have never gotten lost in the Chesapeake bay but I am thinking it would be nice to have at certain times. I am not concerned with a bunch of fancy fish finding capabilities nor do I need a color display. If I go with a GPS I would like to get one with a built in antennae if possible. I would also not want to get a hand held unit but rather something I could mount on a swing out bracket as I have seen others do. I also don't want to spend a lot of money since this is not a must have item for me. I am also a bit confused about what options you need to get to make it usable as far as charts. Is there any unit that you know of that has enough capabilities to tell you where you are and where your destination is for about $300 or so? Thanks.