The Heian Maru was a Japanese ocean liner launched in 1930 that primarily operated as a passenger and cargo ship before being converted into a submarine tender for the Imperial Japanese Navy during World War II. The ship played a significant role in supporting Japanese submarines in the Pacific theater, serving as a repair and supply vessel. In 1944, the Heian Maru was heavily damaged during an American air raid in Truk Lagoon, resulting in the loss of over 200 lives. The wreck of the ship remains a popular diving site due to its historical significance and the presence of artifacts scattered around the site. The Heian Maru is a poignant reminder of the naval warfare that took place during World War II in the Pacific, showcasing the impact of air raids on maritime vessels and the lives lost at sea.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.