That is absolutely mind-bogglingly amazing. In 1/300th too! I originally assumed that they were tiny, "mini-ship"-scale models, around 1/1200... which would have been more than impressive enough, but 1/300 is just unbelievable.
It puts just about every other ship scratchbuilding effort, certainly including mine, to shame. I wouldn't have believed a project like this was possible if I hadn't seen the website!
These USN carrier aircraft put the ones included with Tamiya's 1/350 Enterprise to shame... and they're all made from matchboxes.
http://www.modelshipgallery.com/gallery/dio/collection/matchbox-pw/pages/100_6255.htm
Next to the 1/10 Yamato, this is certainly the most amazing thing I've ever seen as regards ship modelling.