You Do Need power plug adapter while traveling from Sint Maarten to Western Sahara.

Here is Why You Need An Adapter

The outlet and plug type used in Western Sahara are C and E and in Sint Maarten are A and B. This is how they look like.

Sint Maarten

In Sint Maarten, outlets of type A and B are in use.

Type A

Type B

Western Sahara

In Western Sahara, outlets of type C and E are in use.

Type C

Type E