The depth you can achieve is limited by the radio, and the frequency used. Higher freq ( a higher # HRZ or chanel#) will have less ability to penatrate the water. The lower freq, strangely enough, will penatrate further ( it is a longer wavelength, less affected by the water) but with standard (legal) r/c gear, usually about 5 or 6 feet will be max depth before control is lost. Seriously, though, unless you have a camera, with an equally penatrating freq, you probably can't see that deep, that well, unless your in a pool, or other equally exciting venue. Sean