Ha Long Bay is one of the defining images of South East Asia, 1,600 limestone karst formations rising from the Gulf of Tonkin across nearly 1,500 square kilometres of protected water. A motor yacht gives you the most efficient way to reach the bay’s quieter corners, moving beyond the day-cruise routes into Lan Ha Bay to the south and the Cat Ba Archipelago, where anchorages are calmer and the scenery no less dramatic. Motor yachts in the South East Asian fleet range from modern flybridge cruisers to larger expedition-capable vessels, with many repositioning seasonally between Ha Long Bay and the equally spectacular Bai Tu Long Bay to the northeast. Weekly charter rates across the region run from around 44,000 to over 500,000 euros, with an advance provisioning allowance of approximately 30 percent covering fuel, provisions, and local cruising fees. The best season for Ha Long Bay runs from October through April, when skies are clearer and the humidity drops. The classic circuit enters through the main bay, passing the Fighting Cock and Dog rocks before heading into Sung Sot Cave by tender. From there, a motor yacht can push east into Bai Tu Long, a larger bay with fewer visitors and an equally dramatic karst landscape. Lan Ha Bay to the south of Cat Ba Island is a favourite anchorage for longer charters, sheltered and quiet even during busier periods. The floating fishing villages of Vung Vieng and Cua Van are accessible by tender and offer a direct encounter with the living culture of the bay.