So, if you want to numerical simulate, say you have a simulator then you know if you do not say the axis it will give you 10 degree roll, but it may not be the exact location where it is suppose to be. So, in one case you may see that that you know a side say bank another case depending on that you do not see it. So, what I am trying to say in short is that, the the space that a ship occupies you know in space or the place that it occupies in space you know, exactly see this is a D 3 space, where it is exactly located with respect to a frame that will depend on about which axis you are rotating.
See, I can rotate 10 degree here, but I can also get that 10 degree here, but these two are not same. So, if you want to be very exact that is why when you want to do simulator where all the six motions are necessary axis is important. But in a layman when you say the 10 degree rotation, you simply say the 10 degree rotation, because it could be here it