 ... frequently employed for signaling purposes, though when snow was on the ground a black flag was used, and with varying backgrounds the red flag with a white center could be seen at greater distances than the white. To secure secrecy all important...  The Man Hunters - Pagina 258di Melville Davisson Post - 1926 - 348 pagineVisualizzazione completa - Informazioni su questo libro
 | Albert Shaw - 1911 - 968 pagine
...CIPHER SIGNALING To secure secrecy all important messages were enciphered by means of a cipher disk. Two concentric disks, of unequal size and revolving...thirty equal compartments. The inner and smaller disk A- ii G-II22 M-2II2 S- 121 B-I22I H- 211 N- 22 T- i C- 212 I- 2 O- 12 U- 221 D- in J-22II P-2I2I V-2III... | |
 | Francis Trevelyan Miller - 1911 - 394 pagine
...than the white. To secure secrecy all important messages were enciphered by means of a cipher disk. Two concentric disks, of unequal size and revolving...contained in its compartments letters, terminations, and word-pauses, while the outer, larger disk contained r-/£5 fia AT YORKTOWN Skilled Union signal parties... | |
 | Francis Trevelyan Miller - 1911 - 394 pagine
...than the white. To secure secrecy all important messages were enciphered by means of a cipher disk. Two concentric disks, of unequal size and revolving...contained in its compartments letters, terminations, and word-pauses, while the outer, larger disk contained AT YORKTOWN Skilled Union signal parties were available... | |
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