

The navigation devices in the One Piece universe are:

  * The **compass** for the Eastblue, Southblue, Westblue, Northblue
  * The **Log-Pose** for the Grand Line
  * The **New-World Log-Pose** for the New World

Other navigation instruments (in exceptional cases) are:

  * The **Eternal-Pose** for Grandline (always points at the same island)
  * The **South Birds** on Jaya whose bills always point south.
  * The **Kame-Pose** who always points to Mecha

All of these navigation instruments have limitations and disadvantages. The
compass, for example, does not work for the Grandline and New World. The Log-
Pose can follow only one magnetic wave and takes time to record the next
magnetic wave. And the Eternal-Pose works for only one island.

As you can see, navigation in the One Piece universe is very complicated. And
this is the point where my question is. Besides the Eleven Supernovas, all
other pirates, marines and other ships are free to travel through the whole
Grandline and Blues, and to go on any island they want.

In [episode 392](https://www.youtube.com/watch?v=KkPwJEasyKI), Shakuyak
explains how hard it is to travel through the Grand Line for the Eleven
Supernovas as they tried to get to the Sabaody Archipel. However, the Marines
and other pirates commute easily between every island. Do they have an extra
expensive Eternal-Pose for every island?

**So why is navigation so easy for the Marines and other pirates whereas it is
so hard for the Straw Hat crew (as example)?**


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one-piece
How does navigation work in One Piece universe?


Navigating is as easy as the goodness of your maps and directional devices. So
in general I would suspect navigating to be **as difficult for the Strawhats
as for any other pirate crew**. Pirates usually have the same amount of
resources to start with. If anything it should be easier for the Strawhats
because Nami has been looking at maps since she was just a child. Although
this advantage was never really mentioned in the series and I don't think she
was actually able to exploited that knowledge (yet?).

Now you are correct in saying that it is **much easier for the Marines** to
navigate through the world and this makes a lot of sense. The Marines and the
World Government have been around for more than 800 years, since the Void
Century. Therefore they were able to draw maps of the entire world and would
have been able to create many eternal poses for all available islands.

Books with **maps** are available in local stores or libraries as we can see
how Nami's room at Arlong's park was filled with these books. Pirates would be
able to obtain these books, but with the WG having much greater funds, I would
assume every ship to have such maps available to navigate through the seas.
The fact that the Marines travel by map can be seen in chapter 321 when Aokiji
takes his map to check the location the Strawhats are about to travel to.

![enter image description here](https://i.stack.imgur.com/z7gKam.jpg)

While on the grandline, the Marines use **eternal poses** to navigate. This
can be seen in chapter 128 when Smoker asks for an eternal pose to Alabasta.
All they really need to do is contact Headquarters and they will send them an
eternal pose, presumably by air similar to the newspaper birds.

![enter image description here](https://i.stack.imgur.com/O8BXy.jpg)

With the number of smart scientist the WG would have had over the years, it
wouldn't surprise me if the WG would have similar devices for New World. I
don't recall there being any mention of such a device just yet though.


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Well, part of it is the fact that the Marines won't run into pirate
resistance, as they don't get messed up by pirates, not even the strong ones
like the Supernovas or the Four Emperors. No one else would think of messing
with the Marines if pirates won't (probably).

I'm sure they have many more means of transportation, be it a vessel or
navigation instruments, they likely have other technology for easy travel. So
I would say yes, they do have other means of travel and even more efficient
forms of navigation.

There is also the fact that they know how certain parts of the sea are, and
use said knowledge to their benefit and their enemies' disadvantage when
traveling.


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