HMS Challenger II is a British research submarine launched in 1990. It is part of the Challenger-class submarines and is primarily used for deep-sea exploration and scientific research. The submarine is equipped with advanced technology that allows it to operate at great depths, making it valuable for studying marine environments. The vessel is operated by the Royal Navy and has been involved in various missions, including underwater mapping and environmental monitoring. Its capabilities contribute to our understanding of oceanography and support efforts in marine conservation and resource management.