I'm interested in purchasing the Garmin Bluecharts for Norfolk to Charleston area. I'm wondering what level of detail the Bluecharts (not G2) provide? Primarily I'm interested in locating Hard Bottom (or Live Rock) structures close to my port of call (New Topsail Inlet). Any help or advice, or knowledge of this product is appreciated. I'm really interested to find additional fishing spots other than the NCDMF AR's. My boat is 19' so I generally stick inside of the 10 mile mark. Thanks!