Deck : Deck General - 3300/5076
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| A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound __________. |
| A) a 2-second blast every 20 seconds |
| B) a 4-second blast every 20 seconds |
| C) an 8-second blast every 30 seconds |
| D) a 10-second blast every 30 seconds |
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