Abstract In view of the fuzziness and randomness of the safety evaluation of the channel navigation environment. a risk evaluation model of the channel navigation is established with the set-valued statistics and the gray theory. A safety evaluation index system of channel navigation consisting of first-level indexes for the natural environment. navigation conditions. https://www.animationbengal.com/?w=top-sale-napoleon-perdis-the-one-concealer-on-sale-great-pick