Question 746 Deck Safety

The correct answer is B) oxygen indicator. An oxygen indicator is the appropriate tool to detect deficient oxygen content inside a chain locker. Chain lockers can accumulate low-oxygen atmospheres due to corrosion or decomposition of organic matter, which can displace the oxygen. An oxygen indicator can measure the oxygen level and alert the user to this potentially hazardous condition. The other options are incorrect because: A) an oxygen breathing apparatus is used to provide air in low-oxygen environments, not to detect the deficiency; C) a combustible gas indicator is used to detect flammable gases, not oxygen levels; and D) litmus paper is used to test pH, not oxygen content.