I don't know what he has, but look at these pages.
http://img.mangastream.to/manga/one-piece/589/07.png [](http:// http://img.mangastream.com/cdn/manga/51/2860/05.png) http://img.mangastream.com/cdn/manga/51/2860/05.png
Isshin Dojo isn't at Dawn Island and Dragon travelled there pretty much instantly as you can see from his cape still being on fire.
Except Sabo's boat sunk during the day and by the time Dragon arrives on the Revolutionaries's ship, it's already night. I think the swirls around him point to him having the wind fruit. The guy behind him seems surprised and it can't really be due to Sabo's condition since Dragon has his back turned to him. So maybe he appeared out of thin air or just landed?