This WATERPROOF chart is printed on a very durable, extremely tear resistant, waterproof material. This material accepts pencil markings well and also erases well. The paper and printing process has been certified by NOAA and deemed to be suitable to withstand the rigours of use in the marine environment. * WE CANNOT GUARANTEE OTHER SELLERS ON THIS LISTING. OTHER SELLERS MAY OR MAY NOT BE OFFERNG CHARTS PRINTED BY A NOAA POD AGENT AND THEREFORE MAY, OR MAY NOT BE authorised FOR CARRIAGE ON COMMERCIAL SHIPS. IF YOU RECEIVE A CHART PURCHASED FROM THIS LISTING WHICH DOES NOT STATE "PRINTED BY PARADISE CAY PUBLICATIONS" YOU ARE ENTITLED TO A 100% REFUND.