Simpson Bay Lagoon separates the Dutch and French halves of the island, and its western-facing mouth has served as a natural sunset amphitheater since the first Arawak canoes navigated these waters. Modern private sunset cruise St Maarten charters depart from Simpson Bay Marina, where the Caribbean's busiest yacht basin funnels fifty to eighty vessels daily through a single drawbridge that lifts on the hour. The tradition of sunset sailing here dates to the 1970s, when charter captains discovered that the Anguilla Channel's lack of western land mass produces an unobstructed 180-degree horizon line, a geographic rarity in the Lesser Antilles. The lagoon itself spans four square miles and reaches depths of only twelve feet in most sections, forcing larger catamarans and trimarans to time their departures with tide tables. Once through the bridge, vessels enter the sheltered lee of Maho and Mullet Bay, where trade winds drop to five knots and the water flattens into a mirror surface. This calm corridor extends three miles offshore, allowing non-sailors and families to experience open-water cruising without the pitch and roll of the Atlantic side. Captains anchor near the reef line at Pelican Key or drift off Cupecoy Beach, positioning their sterns toward the sun's descent between 18:15 and 18:45 depending on the month. St Maarten's dual-nation status means vessels registered in either jurisdiction may operate these waters, and most private charters comply with both Dutch and French maritime codes. The island's position at 18 degrees north latitude produces minimal seasonal variation in sunset time, rarely shifting more than thirty minutes between solstices. This consistency has made Simpson Bay the Caribbean's second-busiest charter port after the Virgin Islands, with an estimated 22,000 sunset cruises departing annually. The volcanic peaks of Saba and St Eustatius rise on the northwest horizon sixty miles distant, visible as silhouettes when atmospheric conditions align during the golden hour.