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

Here is Why You Need An Adapter

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

Western Sahara

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

Type C

Type E

Sint Maarten

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

Type A

Type B