Ocean Marina, anchored along Sukhumvit Road eight kilometers south of central Pattaya, operates Thailand's largest yacht basin and has evolved into the Gulf of Thailand's premier departure point for multi-island expeditions since its 2009 expansion. The 356-berth facility serves as the staging ground for luxury catamarans and motor yachts that navigate the Eastern Seaboard's coral-fringed archipelago, a constellation of preserves and fishing villages visible from shore yet accessible only by water. Pattaya's yacht charter industry emerged in the early 2000s as developers recognized the untapped potential of the nearby islands—Koh Larn, Koh Phai, and Koh Rin—each offering distinct marine ecosystems within a two-hour radius. Koh Larn, lying nine kilometers offshore, draws the largest visitor volume with its six named beaches and shallow reef platforms ideal for novice snorkelers. Koh Phai, a protected naval zone until 1997, retains a wilder character: its eastern anchorage shelters blacktip reef sharks and schools of barracuda, while the western shore hosts seasonal nesting sites for hawksbill turtles. Koh Rin, the smallest of the triad, functions primarily as a snorkeling waypoint, its submerged granite boulders colonized by staghorn and table corals. Modern luxury yacht tours depart Ocean Marina between 08:00 and 10:00, capitalizing on calm morning seas and optimal underwater visibility before midday thermal currents stir sediment. Twin-hulled catamarans, ranging from 45 to 60 feet, dominate the fleet—their shallow draft permits close approach to reef zones without anchor damage, a critical advantage in marine conservation areas where mooring buoys remain sparse. Onboard amenities mirror resort standards: cushioned sun decks, freshwater showers, sound systems, and galley-prepared Thai buffets featuring grilled seafood, som tam, and jasmine rice. Sunset itineraries extend into evening, timing arrivals at western anchorages to coincide with the 18:30–19:00 golden hour, when the sun descends behind Pattaya's hotel skyline and the gulf transitions from turquoise to violet. Some operators enhance the return leg with live DJ sets, transforming the upper deck into a floating lounge as running lights trace the route back to marina berths. The sector's growth reflects broader shifts in Thailand's coastal tourism: visitors increasingly favor experiential, water-based programming over static beach resort stays, and the yacht tour model delivers both mobility and exclusivity within a single-day framework.