Title: Scuba Midterm Flashcards | Quizlet
Headings: Scuba Midterm
Scuba Midterm
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Content: 4: Both the first and third answers are correct. Both the first and third answers are correct. A regulator system may include: 1: A first stage and primary second stage. 2: An alternate air source second stage (or a connection to an alternate-air-source inflator on the BC). 3: A submersible pressure gauge (SPG), which is usually part of an instrument console.