modern hull shape

Hi guys
I have seen that many boats have devided hull on sections. Few levels of hull, something symilar to stairs. Is someone can tell why the modern hulls look like this and what is adventages and disadventages of this solution regarding to traditional deap v.
Google Image Result for http://uk.boats.com/boat-content/files/image00726.jpg https://images.app.goo.gl/x6ZJ48ksZRKvyUZQ8

 

Stepped planing hulls are not a new idea, but really only come into their own at break-neck sort of speeds, flying boats are one application where the idea was popular, largely because they need to be going at a good clip to get airborne, and anything that reduces the drag makes getting airborne easier, and over less distance. The idea rests upon the ability to reduce wetted hull area.

 

As Mr Efficiency says, they are not a new idea and almost de rigueur for Gold Cup boats of the 1920's. See these two threads.
What is world's biggest planning hull boat and how fast? https://www.boatdesign.net/threads/what-is-worlds-biggest-planning-hull-boat-and-how-fast.64476/page-5#post-898680
Basic questions about V hulls https://www.boatdesign.net/threads/basic-questions-about-v-hulls.41264/#post-516924

 

Mr Efficiency,
jehardiman
Thanks for responde. Very good sample.