Page:Popular Science Monthly Volume 89.djvu/823

 Instructions for Wigwa^sfing with Flags

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��INTER'ROGATORY (O)

���AFFIRMATIVE (?)

����"Negative," "Affirmative," or "Interrogatory" followed by "Interval" give corresponding meanings to the following signal

Receiver acknowledges "Attention" whenever made, also "Repeat," etc., and end ot message when latter is under- stood

While waiting for "Acknowledgment," or in case of delay remain at "Interval"

Words not in code are spelled out

"Numerals" precede every number sent and indicates numerals until "Interval" is made, after which letters recur without any further indication. When numerals follow letters no intervening "Interval" is necessary. The numerals are the first ten letters in order. When communicating with the Navy numerals are spelled out

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��ATTENTION

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