Ship owners, whether merchant marine or fishing orientated, have seen their requirements for data communication steadily grow over the past few years, and this trend should continue in the future. The TCP/IP suite of protocols, with its most used applications, e-mail and web browsing, has become a common communication tool for any shipping company or for ship owners. Indeed, a company Intranet with external access to the general Internet backbone has become an essential productivity tool. It is therefore essential for ship owners to have their vessels become an integral part of their internal TCP/IP network. This results in increasing data transmission between the vessels and the shores. Consequently, ship owners must have the appropriate tools enabling them to manage this increased data flow without having their (satellite) communication costs spinning out of control.