History of scuba diving the high number of recreational scuba accidents. this started with informal training and led to the creation of training and certification agencies. BS-AC was formed in 1953, CMAS in 1959, NAUI in 1960 and PADI in 1966. The sport of scuba diving had its roots among the multitude of small enthusiastic snorkelling and spearfishing clubs in the decades just before and after the Second World War. After the invention of the "aqualung" by Cousteau and Gagnan, the first commercially marketed underwater breathing apparatus became available for sale for sporting purposes in the late 1940s. In 1951, Jim Auxie Jr and
James May's 20th Century chronological order. The programme is now shown on Eden, Yesterday and Dave. The theme tune is called "The Long Boot", by Jeff Knowler. Sam Wollaston writing for Guardian Unlimited described James May's 20th Century as "essentially Top Gear, masquerading as something educational" but conceded that if "teaching history can be achieved through Top Gear, then maybe that's not such a bad thing". The New Statesman thought that James May was "ill-suited to the task in hand" and described the biggest problem as May being unable to "put his wretched motors behind him". The Lancashire Telegraph wrote positively of the show