Vasa, the ship that sank
The Vasa is a Swedish warship built in the early 17th century. The ship sank after sailing about 1,300 meters (1,400 yd) into her maiden voyage on 10 August 1628. Vasa was built top-heavy and had insufficient ballast. Despite an obvious lack of stability in port, she was allowed to set sail. After a few minutes she encountered a wind stronger than a breeze and started to heel to port, pushing the open lower gun ports under water, causing water to rush in on the lower gun deck. The gun ports were open because it was intended to give a cannon salute to the crowd and many VIP’s who were in the harbor to see the maiden voyage of Sweden’s biggest warship. The inflow of water heeled Vasa over further, and she quickly sank.