41756329079550_page_155

41756329079550 | page 155 | https://thedailydialectics.com/pdfs/FIOA/41756329079550/41756329079550.pdf

6 REF ID; A611 63 @ SECREE— OOM U : ce ALAMETCO 1, Alametco is a hand: substitution cypher, designed for the transmission of mstecrological information between ground-stations and — aircraft, It ‘has been in use.in the R.A.F. since the latter part of the war, ; 2, Adreraft are provided with…