uses The tower was also privately hired to civilian diving clubs for the purpose of recreational diving and dive training. It was a popular 'novelty' dive amongst UK scuba divers since it allowed new trainees to extend their depth experience in a safe, controlled environment with good visibility and warm water temperature – two conditions that are in short supply in the UK. For similar reasons it was also used for freediving training, with participants including world record-holder Tanya Streeter. In addition, the SETT has been used frequently for both underwater equipment testing, and to support media activity – notably hosting Blue Peter on a number of occasions, with some presenters completing ascent training. It has also been used frequently as a situation assessment trials tank (SATT) for technical divers. US Navy US Navy escape towers were known as Escape Training Tanks. From the 1930s through the 1990s they were used for training in buoyant ascent, the Momsen lung, and the Steinke hood. The decommissioned tower on Ford Island, Hawaii, was built to train United States Navy Pacific Fleet submariners prior to World War II, and was converted for use as an airport control tower after the attack on Pearl Harbor. Across the harbor, the tower on Sub-Base Pearl Harbor was used between 1932 and 1983. Neither of the U.S. escape towers in Hawaii are in use. The towers were also used to train scuba equipped divers (SEALs) or Underwater Demolition Teams to access or egress the submarine during special operations. The tower once located on Naval Submarine Base New London was in use between 1930 and 1994 and has since been razed. The Submarine Escape Trainer, a high, 84,000-gallon pool with two escape trunks was constructed at New London in 2007. Other facilities Similar facilities are operated by the Royal Australian Navy at the Submarine Escape Training Facility at , in Norway and Sweden, and in Turkey at Gölcük Naval Base. The German Navy operates a 36-metre-deep escape training pool, built in 1977, at Einsatzausbildungszentrum Schadensabwehr Marine (Damage Control Training Centre) in Neustadt in Holstein. Since 2013 there is a submarine escape training tank situated next to non-profit swimming pool "Het Heersdiep" in Den Helder, The Netherlands. This tank is used by the Royal Netherlands Navy and also by other navy's from all over the world. The tower at Aquacentrum Den Helder can also be used by civilian diving