You Do Need power plug adapter while traveling from Sint Eustatius to Trinidad & Tobago.

Here is Why You Need An Adapter

The outlet and plug type used in Trinidad & Tobago are A and B and in Sint Eustatius are A, B, C and F. This is how they look like.

Sint Eustatius

In Sint Eustatius, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F

Trinidad & Tobago

In Trinidad & Tobago, outlets of type A and B are in use.

Type A

Type B