请问一下科普知识，为什么军舰航速大多都是达到30节，而两栖攻击舰和登陆舰都只有20节？



1. It is true that most warships are designed to achieve speeds of up to 30 knots, reflecting the navy's emphasis on rapid deployment and response capabilities.2. Amphibious assault ships and landing craft, however, typically max out at speeds of around 20 knots. This is due to a deliberate design choice that prioritizes the carriage of heavier equipment and personnel.3. These vessels are constructed with larger dimensions, particularly in terms of width, similar to cargo ships. Such a design choice increases drag, which in turn limits their maximum speed.4. In contrast, standard warship designs are longer and sleeker, which helps to reduce drag and allows for faster speeds with the same amount of power.