Deck : General Navigation - 408/2138
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| When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. This process is called __________. |
| A) raising a light |
| B) obscuring a light |
| C) bobbing a light |
| D) checking a light |
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