Page:United States Statutes at Large Volume 55 Part 2.djvu/621

 55 STAT.] INTER-AMERICAN-RADIO COMMUNICATIONS-JAN. 26, 1940 1495 QUESTIONNAIRE FOR THE COORDINATION OF METEOROLOGICAL INFORMATION TRANSMISSIONS. Immediate Future Question Possibilities Prospects 1.- Number of radio transmitters and schedule of time available 2.- Location of transmitters 3.- Frequency bands available in each trans- mitter 4.- Working frequencies of the transmitters (include all frequencies available for this service) 5.- Kind of frequency control (crystal, etc.) and class of emission (Al, A2, A3) 6.- Effective power in antenna of the trans- mitters 7.- How many simultaneous transmissions can be made with equipment available. 8.- How many different frequencies can be received simultaneously 9.- The time (G.M.T .) at which it will be possible to begin daily transmissions of synoptic observations of 12, 18 and 23 or 24 o'clock G.M .T. 10.- Maximum time required for the transmission of the observations of No. 9. (1) Indicate approximate date of accomplishment. VII ROUTE FREQUENCIES PROVIDED BY THE GENERAL RADIO REGULATIONS. a) That every effort be made to shift at the earliest practicable moment the aeronautical mobile services of the air routes to those frequencies which were allocated by the Cairo General Radio Regulations for these particular routes. b) that the Cairo Inter-American route frequencies be not employed within national boundaries except wherein required for services to the air routes between the countries of the Americas. c) that all of the installations at present available for the needs of the security of Inter-American flights should be maintained in effect until replaced or no longer required because of other adequate provisions. VIII ADDITIONAL FREQUENCIES BELOW 6000 Kc REQUIRED FOR INTER- CONTINENTAL AIR ROUTES a) That, insofar as possible, all the American countries should select the same frequencies for use throughout any given Inter- American route; b) that short distance frequencies be provided to supplement the long distance frequencies assigned by the General Radio Regulations to the Inter-continental air routes in order to insure aeronauti- cal route communications at all distances.

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