You Do Need power plug adapter while traveling from Marshall Islands to Abu Dhabi.

Here is Why You Need An Adapter

The outlet and plug type used in Abu Dhabi is G and in Marshall Islands are A and B. This is how they look like.

Marshall Islands

In Marshall Islands, outlets of type A and B are in use.

Type A

Type B

Abu Dhabi

In Abu Dhabi, outlets of type G are in use.

Type G