open-circuit scuba

open-circuit scuba

[′ō·pən ¦sər·kət ′skü·bə]
(engineering)
The simplest type of scuba equipment, in which all exhaled gas is discharged directly into the water and the utilization of gas is therefore equal to the mass exhaled.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The bubbles emitted by an open-circuit scuba (self-contained underwater breathing apparatus) are oxygen and other gases that are exhaled.