ED T C I R T S E R | cs SECURITY. INFORMATION * : po “y an TN : : a: To avoid interfering with other ‘paftio,s ‘an operator“ghell a liaten in to make certain that |a circuit is clear before@ malcing an trans- a _ missions thereon. - _ - aae ne - 20, Betablishing ccmnionticie: re 7 ’ oo . ‘ : F i. : Signal Strongth and Readability oo ae “A ‘station is understood to have good signal: strength. and readability unless otherwise notified. Strength of signals and readabil— , ity will not be exchanged unless one station cannot clearly hear another station.° . . . Bess er peraTery ; Before conducting regular traffic over radiotelephone circuits , ‘4t may be necessary to make contact with the other station (s) involved to acsertain that communications. is possible. Sa, . a me So he A station that ‘wdishes to inform another of his cague stvength and readability will-de so by means of a short and concise report of actual reception, such as "Weak, but readable", "Strong, ‘put distorted", "Loud and . clear", ste. Reports such as "Fiveby five", ‘"Four by four", etes, will © not be used to indicate strength and quality.of reception: A station desir~ ‘ing .to know how his transmission is being received will transmit-"How-do” - you h| ear me?", What is my: meadapiiity™s “Report my,y signals", ote.a oe

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