Deck : General Navigation - 385/2138
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| Illustration D037NG below represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash? |
| A) One red light |
| B) Two red lights |
| C) Three red lights |
| D) One amber light |
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Illustration D037NG
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