heavy enough anchor and enough rope out for sure I use to wade fish in Corpus Christi Texas. at times I would be a quarter of a mile away from my 17 1/2 boat. I could not take a chance of not having a adequate anchor. Make sure your rope is long and a good heavy anchor. For additional insurance you can add a 3 ft chain directly to anchor and chain will hold anchor flat and stay dug in. Never had any issues with a chain directly to anchor.