what is the useful life of a boat
the yacht is the boat which has major impacts during the 25 years of its useful life (in red) and the sailboat is the second boat with major impacts during the 25 years of its life (in orange). Finally the RIB, with a lower amount of materials used a lower weight and a shorter useful life, has minor impacts comparing to the other two boats (in green). Nevertheless, if these environmental impacts indicators are expressed by one hour navigated with each kind of boat (as it is defined in our functional unit) it can be seen that the yacht have major impacts (in red) followed by the RIB (in orange),