I have talked about larger models. Now, if you make a larger model, the model cost is more and also the facility in which this larger model can be tested will have to be different from the facility in which a smaller model can be tested; you require large quantity of force to be measured because larger model will give you large force, so you require different sets of instruments and equipment to measure them. So, therefore, larger models are more expensive, and larger model testing is more expensive because you are going to a bigger tank where more sophisticated equipments are there. So, the scale at this stage one has to determine based on your expense account and the accuracy level you want- it is a compromise between the two. The other aspect you must remember, if you have to go for a propulsion test, subsequently the propeller scale will affect the model scale because the propeller has to be fitted behind the ship; so, that is the other reason for which you can determine, if you are going for a propulsion test later on, then you must determine the scale of the propeller and the ship model simultaneously so that later on you do not get any problem.