

I have noticed that traveling between and within the oceans in the One Piece
world isn't easy. [![enter image description
here](https://i.stack.imgur.com/FGCI1.jpg)](https://i.stack.imgur.com/FGCI1.jpg)

However, the Marines and some advanced pirate crews/alliances commute daily
between the oceans. To be more specific, here are a few examples to
demonstrate what I mean:

  1. The Marines travels between every oceans they want. By using Seastone on their ships, they can easily travel through the Calm Belt and switch between the Grand Line/New World and all Blues. Because the Marines is a member of the World Government, they can also pass the Red Line via Mary Joa.

However, the Seastone technique (Episode 410) is a new invention from Dr.
Vegapunk. How did the Marines travel through the Calm Belt so easy before
that? Another example in [episode
502-503](https://www.youtube.com/watch?v=BiFOvnqltYw): How did a World
Government ship travel from the Grand Line to East Blue 10 years ago when
Seastone technique hadn't been invented?

  2. In [Luffy's past](https://www.youtube.com/watch?v=rhK3BRBsF34), Shanks was in the East Blue, then in the [Battle of Marine Ford](https://www.youtube.com/watch?v=RD-4E3Zg_Qs), he was again in Grand Line, etc.

Same for Whitebeard. One time, Whitebead was in the Grand Line,
[then](https://www.youtube.com/watch?v=L_v1KGYYf6Y) in the East Blue, and then
again in the Grand Line, etc.

How do Shanks and Whitebeard manage to travel between the Grand Line and the
Blues on daily basis? **Do Whitebead, Shanks and other Pirates also use
Seastone like the Marines?**

  3. And what about Monkey D. Dragon? [One time](https://www.youtube.com/watch?v=oXfNIwcfa_M), Dragon was in the East Blue. [Here](https://www.youtube.com/watch?v=a3ZCploiduQ), he was again in the Grand Line.

So I hope you see what my question is. I'm especially curious about the daily
switching between the Grand Line/New World and Blues. As I know, the only way
to enter the Grand Line is via the Reverse Mountain, which isn't the most
harmless way as you can see in [episode 61](http://onepiece-
tube.com/folge/61). Does that mean that every time Whitebeard and Shanks want
to go to the Grand Line, they have to pass this small river with their
gigantic ships?

Apart from getting to the Grand Line, how do they leave the Grand Line/New
World? According to the
[maps](http://www.opwiki.de/images/Karte_der_Grandline.jpg), there is no way
to get out. How did [Krieg](http://onepiece.wikia.com/wiki/Krieg) leave the
Grand Line?


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question
one-piece
How does the travel works in One Piece universe?


It's been revealed there are several ways to travel apart from traditional
ships. It's also been hinted that the islands range from prehistoric to scifi
advanced, so there are methods yet to be revealed.

  1. For example, Rayleigh swam from the Grand Line through the Calm Belt to reach the Amazon's Island. 
  2. Skypieans have been shown to have flying devices and shells that could propel. 
  3. Amazons have been shown to use creatures to pull the boats. 
  4. Blackbeard's boat is just a giant raft, implying they just use a sail and row. (Given the strength of the characters in this class, chances are that there were a lot of rowing involved)
  5. Franky came up with Coup de Burst, which also lets them cross vast distances quickly. 
  6. Several subs have been shown so far including Wapol, and the Heart Pirates indicating travel without need for waves. The Marines probably have access to this tech (at least, Z's Neo Marines did). 
  7. More importantly, several fruits aid in propulsion. Ace used fire to power his skateboat. Whitebeard could probably just cause waves even in the Calm Belt to propel his ships (and quite fast I might add, based on wave size and speed). Dragon (though not confirmed how) was the reason for the gust of wind that helped Straw Hats escape from Loguetown. He may be using similar methods. Dragon also used to have Bartholomew Kuma, who can repel things and land them anywhere in the world.
  8. Several characters, including Sanji, can use Moonwalk.


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answer