L'Espérance Airport, also known as Grand Case Airport, is a public use airport located in Grand Case, on the French side of the Caribbean island of Saint Martin. The airport is used only for smaller aircraft for regional flights, as Princess Juliana International Airport on the Dutch side of the island is the larger airport served by all major carriers including to international destinations.Joint border control with the Kingdom of the NetherlandsIn 1994, the Kingdom of the Netherlands and France signed the Franco-Dutch treaty on Saint Martin border controls, which allows for joint Franco-Dutch border controls on so-called "risk flights". After some delay, the treaty was ratified in November 2006 in the Netherlands, and subsequently entered into force on 1 August 2007. Though the treaty is now in force, its provisions are not yet implemented as the working group specified in the treaty is not yet installed.TowerSince official opening of the new control-tower PJIA Air Traffic Controllers have two radar systems at their disposal with a range of 50NM and 250NM. PJIA air traffic control manages 4000sqnmi of airspace around the airport. Besides providing approach, tower and ground control at PJIA, Juliana air traffic services also provides approach control for L'Espérance and for Wallblake Airport (Anguilla), Gustaf III Airport (St. Barths, French West Indies), F.D. Roosevelt Airport (St. Eustatius, Netherlands) and Juancho E. Yrausquin Airport (Saba, Netherlands).