While the largest-scale commercial air routes are all dominated by large multi-engine jet aircraft, smaller turboprops have become crucial to the fleets of commuter airlines across the globe. In places like the Lesser Antilles of the Caribbean, the DHC-6 Twin Otter is among the most common aircraft you will see at airports like Princess Juliana International Airport (SXM) in Saint Martin or Gustaf III Airport in Saint Barthélemy (SBH).