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[ 05-06-2003: Message edited by: petede ]
It's the old story - a ton of lead weighs the same as a ton of feathers and "displaces" the same amount of water, BUT the volume of space they occupy is very different. Thus the newer ships will have more volume (a bigger GROSS tonnage) than older ships of the same Displacement tonnage.
The draft is immaterial as it can be altered by changing the length x breadth
....peter
quote:Originally posted by petede:Most cruise ships have a 25 foot draft or less these days, allowing them to enter all popular ports.
Actually I think a lot of the new ships - at least the post-Panamax ones - have a draft of 28 feet or so.
Not sure about the latest "Panamax-max" ships in the 80,000-100,000 GRT range though.
quote:Originally posted by saf28:OK then...Let me get this straight. I read the thing about Gross tonnage and displacement. So for example the QM2 Gross tonnage of 150,000 is just a measure of volume then?
Yes.
So its actual weight on land would less then a older ship. Not necessarily since she is, after all a very large ship, the largest passenger ship.
The essencial data we don't have yet (or I didn't remember reading it yet) is the displacement (that is the weight of the ship if you multiply by the referencial weight/volume ratio of salt water).
In fact, we do need the definitive draft, waterline lenght and beam of the hull and its bloc coefficient for knowing its displacement.
By the way and to answer your original question, new ships usually have a lesser draft (for a same displacement I mean), because they have a larger waterplane area than the older ones (so ratio between lenght and beam and before all how this surface is geometrically filled).So, and because of that, an heavy ship can have a lesser draft than a lighter one.
[ 05-07-2003: Message edited by: Vaccaro ]
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