The most common meassure used for yacht rankings is length. While valid, it is not the right meassure for yacht size. The size of a yacht is the total volume of that yacht, or gross tonnage. Some long yacht are smaller is size than shorter ones. Is very interesting to see the difference that makes in the world ranking: Yacht. By length. By GT. GT Eclipse. 1. 2. 13,564 Dubai. 2. 3. 12,488 Al Said. 3. 1. 15,850 Topaz. 4. 5. 11,589 Al Mirqab. 11. 7. 9,518 Octopus. 12. 6. 9,932 Katara. 13. 8. 7,922 And the world largest yacht is Al Said, not Eclipse.
While true in theory, in practice this is only applicable on merchant vessels where the volume has an economical effect. The volume might be greater but translated to "Less outer deck spaces" which is not a quality for many yachtsmen (Or owners for that matter!), then the space used for machinery to create a helicopter garage that opens and rises above deck is a cut in volume but a feature that makes the yacht "Better", so for now, in my opinion, the ranking system by LOA stands in classifying or ranking yachts. One last thought is that if the volume was the focal point, then all mega yachts would have thrown all the toys aboard and made more staterooms, while in fact many are bigger than cruise ships and ferries yet cater to 12-24 sleeping guests only. Cheers,
The world ranking is only about size, not other qualities like deck space or how you use that size, or whether you like or dislike a yacht. Yachts are tri-dimensional objects, and length, height or width are only partial measures. Volume measures all three of them. And by the way, most yachts have already thrown aboard all the toys and have as many staterooms as the owner needs and can pay for.
This is what I was saying, size, not tonnage. I made a mistake saying "Aboard" I meant "Overboard", and what I meant was, since the ranks we are talking about are all custom built, the owners CHOOSE to have less staterooms and more deck space, living space, toy storage, bigger crew quarters, so if the need was directed towards gross tonnage, they would choose more staterooms, less size of rooms and less amenities, because the use of gross tonnage has to be economical, which is not the case on yachts, another things is the displacement, compare a yacht to a commercial ship of the same size, they "might" have the same gross tonnage, but would the yacht be able to manage the weight of cargo? Would still be as stable as needed, you will notice that the same size yacht and ship will have same dimensions, same GRT maybe but different displacement (less in the yacht) because yachts are built differently. I am not saying your method is wrong, after all, captains of yachts are chosen based on GRT rating according to regulation and standards, so this matter is technical and for special uses. Leisure boats are considered toys and compared by length for the "bigger" factor. This is all my opinion, and since am talking about personal opinions, in my opinion, many yachts should be classified as ships! That's just me! Cheers,