These series of submarines represent significant advancements in the use of acrylic for deep diving submersibles. The AP6 Alicia, built by Marlin Submarines and featured on the Discovery Channel, allowed passengers to experience a "floating in space" feeling, due to its mostly acrylic hull. The Triton series of acrylic submarines gained fame through the TV series Blue Planet and are highly sought after by marine scientists for their incredible views, maneuverability, and reliability.