As Pices said, use the correct keys
Attack scope: raise = page up; lower = page down
Observ scope: raise = insert; lower = delete
To speed up the process, hold down the SHIFT key when pressing the appropriate key.
OR .....
Press F3 to get to the periscope view. The attack scope is the default. Press "O" to switch to the observation scope. Then use the "periscope up/down toggle switch just to the left of the light for tube 5 to raise or lower the scope .
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Raptor
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