Scuba gas planning is the aspect of dive planning and of gas management which deals with the calculation or estimation of the amounts and mixtures of gases to be used for a planned dive. It may assume that the dive profile, including decompression, is known, but the process may be iterative, involving changes to the dive profile as a consequence of the gas requirement calculation, or changes to the gas mixtures chosen. Use of calculated reserves based on planned dive profile and estimated gas consumption rates rather than an arbitrary pressure is sometimes referred to as rock bottom gas management. The purpose of gas planning is to ensure that for all reasonably foreseeable contingencies, the divers of a team have sufficient breathing gas to safely return to a place where more breathing gas is available. In almost all cases this will be the surface.
"}{"type":"standard","title":"Ocean Prey","displaytitle":"Ocean Prey","namespace":{"id":0,"text":""},"wikibase_item":"Q109974488","titles":{"canonical":"Ocean_Prey","normalized":"Ocean Prey","display":"Ocean Prey"},"pageid":69380919,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/en/b/b3/Ocean_Prey.jpeg","width":257,"height":388},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/en/b/b3/Ocean_Prey.jpeg","width":257,"height":388},"lang":"en","dir":"ltr","revision":"1282906288","tid":"eb808f80-0c7d-11f0-8871-65dcf9db946b","timestamp":"2025-03-29T09:12:21Z","description":"2021 novel by John Sandford","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Ocean_Prey","revisions":"https://en.wikipedia.org/wiki/Ocean_Prey?action=history","edit":"https://en.wikipedia.org/wiki/Ocean_Prey?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Ocean_Prey"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Ocean_Prey","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Ocean_Prey","edit":"https://en.m.wikipedia.org/wiki/Ocean_Prey?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Ocean_Prey"}},"extract":"Ocean Prey is a mystery, and suspense novel by John Sandford released in 2021. The book reached number one on the New York Times Best Seller list. The novel is about two detectives who investigate the murder of three members of the Coast Guard. The novel is the 31st in the John Sandford Prey Series.","extract_html":"
Ocean Prey is a mystery, and suspense novel by John Sandford released in 2021. The book reached number one on the New York Times Best Seller list. The novel is about two detectives who investigate the murder of three members of the Coast Guard. The novel is the 31st in the John Sandford Prey Series.
"}{"type":"standard","title":"City of My Dreams","displaytitle":"City of My Dreams","namespace":{"id":0,"text":""},"wikibase_item":"Q5123830","titles":{"canonical":"City_of_My_Dreams","normalized":"City of My Dreams","display":"City of My Dreams"},"pageid":35230697,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/en/9/9f/City_of_My_Dreams_book_cover.jpg","width":258,"height":387},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/en/9/9f/City_of_My_Dreams_book_cover.jpg","width":258,"height":387},"lang":"en","dir":"ltr","revision":"1254259283","tid":"e50dce5e-9675-11ef-bf19-adefea873311","timestamp":"2024-10-30T04:17:37Z","description":"Novel by Per Anders Fogelström","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/City_of_My_Dreams","revisions":"https://en.wikipedia.org/wiki/City_of_My_Dreams?action=history","edit":"https://en.wikipedia.org/wiki/City_of_My_Dreams?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:City_of_My_Dreams"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/City_of_My_Dreams","revisions":"https://en.m.wikipedia.org/wiki/Special:History/City_of_My_Dreams","edit":"https://en.m.wikipedia.org/wiki/City_of_My_Dreams?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:City_of_My_Dreams"}},"extract":"City of My Dreams is a 1960 novel by the Swedish writer Per Anders Fogelström. The narrative follows a group of working-class people on Södermalm in Stockholm between 1860 and 1880. It was the first novel in a series of five. It was adapted into a 1976 film with the same title, directed by Ingvar Skogsberg.","extract_html":"
City of My Dreams is a 1960 novel by the Swedish writer Per Anders Fogelström. The narrative follows a group of working-class people on Södermalm in Stockholm between 1860 and 1880. It was the first novel in a series of five. It was adapted into a 1976 film with the same title, directed by Ingvar Skogsberg.
"}{"type":"standard","title":"Methicillin","displaytitle":"Methicillin","namespace":{"id":0,"text":""},"wikibase_item":"Q409262","titles":{"canonical":"Methicillin","normalized":"Methicillin","display":"Methicillin"},"pageid":424484,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/Methicillin.svg/330px-Methicillin.svg.png","width":320,"height":246},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/Methicillin.svg/512px-Methicillin.svg.png","width":512,"height":394},"lang":"en","dir":"ltr","revision":"1284793315","tid":"3ef4b19b-1577-11f0-bc44-209eae52bd54","timestamp":"2025-04-09T19:17:15Z","description":"Antibiotic medication","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Methicillin","revisions":"https://en.wikipedia.org/wiki/Methicillin?action=history","edit":"https://en.wikipedia.org/wiki/Methicillin?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Methicillin"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Methicillin","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Methicillin","edit":"https://en.m.wikipedia.org/wiki/Methicillin?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Methicillin"}},"extract":"Methicillin (USAN), also known as meticillin (INN), is a narrow-spectrum β-lactam antibiotic of the penicillin class.","extract_html":"
Methicillin (USAN), also known as meticillin (INN), is a narrow-spectrum β-lactam antibiotic of the penicillin class.
"}