Enclosed Space

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Across
  1. 1. A toxic gas found in Inert Gas
  2. 2. Used for communication
  3. 3. Maintains watch over those entering enclosed space
  4. 6. Common enclosed space found in the foc'sle space
  5. 8. Gas concentration safe for workers day after day
  6. 10. Must be stopped prior measurement of gas
  7. 13. Used also for working aloft
  8. 14. Person authorised to permit entry
  9. 16. A toxic gas commonly found in bunker tanks
  10. 17. Used in SCBA bottles
  11. 18. Does not by itself make the job safe
Down
  1. 1. Person with knowledge and experience to make assessment of dangers in enclosed space
  2. 4. Instrument for measuring gas concentration
  3. 5. Friendly gas
  4. 7. Flammable gas
  5. 9. Periodic checking and adjusting of measuring instruments
  6. 11. Space with limited entries
  7. 12. Percentage of oxygen in air
  8. 15. Used with SCBA
  9. 19. Assessment is done prior to any enclosed space entry