| 21. | During the signal flags at that time.
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| 22. | Is that the signal flag the president wants America to fly on his tour ? ( BOX)
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| 23. | Rodgers used his signal flags to trick " Highflyer " into believing that " President " was.
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| 24. | A marine vessel is required to signal flag ( white border with one central blue square ).
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| 25. | They hand-washed cloth diapers and hung them to dry on the yardarm where they usually put signal flags.
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| 26. | The Confederate batteries mistook Gilbreath's handkerchief as an actual signal flag, opening fire and giving away their position.
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| 27. | Clothing that is yellow, green or red is disallowed because those colours are the colours of signal flags.
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| 28. | Ships in formation reverted to pre-wireless methods, including semaphore and signal flags, with signal lamps used at night.
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| 29. | The first was not answered because the Germans did not understand the coded plain-language Morse and signal flag.
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| 30. | Naval signalling was briefly considered and he suggested a simple system of thirty-six signal flags of three colours.
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