水肺潜水安全，橙色浮标漂浮在泻湖水面，下方有潜水员气泡

ge surface marker buoy floats in Ko Haa Lagoon's turquoise water, divers' bubbles rising through the clear column as they complete a mandatory three-minute decompression safety stop at five metres. The SMB signals diver presence to boat traffic above, a critical safety requirement in active marine ecotourism dive sites. Limestone karst of Ko Haa island frames the upper edge, its ancient geology rising above the reef system it defines. 4K, vertical, wide angle, surface shot. Ko Haa Lagoon, Andaman Sea, Krabi Province, Thailand.