Goods need to be loaded in the reverse order to the expected unloading sequence. This avoids the need to move goods around when unloading and makes the unloading process more efficient. In the case of large vehicle such as ships this is even more important as goods will usually need to be unloaded to a temporary location. If a truck were loaded the wrong way round, this may result in a number of goods being unloaded in order to gain access to the required goods. If this happened with a ship, it could be a much more serious problem.