Neutral buoyancy diver maintains neutral buoyancy by continuous correction, usually by controlled breathing, as neutral buoyancy is an unstable condition for a compressible object in a liquid. The mathematician Archimedes discovered much of how buoyancy works more than 2000 years ago. In his research, Archimedes discovered that an object is buoyed up by a force equal to the weight of the water displaced by the object. In other words, an inflatable boat that displaces 100 pounds (45 kilograms) of water is buoyed up by that same weight of support. An object that floats in the water is known as being "positively" buoyant.
The Legend of Heroes 2017, with a fourth and final title planned for release in 2018. While initially having an inconsistent record with English language releases, by 2017, nine of the thirteen titles had been localized. English releases include the original title by Falcom themselves, the "Gagharv" trilogy by Namco Bandai, and the "Trails in the Sky" trilogy and first two titles of the "Trails of Cold Steel" series by Xseed Games. A "Dragon Slayer: The Legend of Heroes" original video animation anime was released in 1992, the same year that "Dragon Slayer: The Legend of Heroes II" was released, loosely based on the