AOPA Pilot Magazine - March 1958 - (Page 68) THE ORIGINAL X-COUNTRY FLIGHT PLANNING INSTRUMENT have good eommimications established with a tower, for example, and an emergency occurs, do n o t try to change frequencies just to get on the emergency channel. On the other hand, if you get in trouble and are not too sure who may be in the beat position to help, then a MAYDAY call on 121.6 will bring in anyone within receiving distance, All CAA towers, comnrunicataons stations and m s military facilities guard 1 1 6 ot 2.. Growid watrol-191.7 and 131.9. One "ALL , IN ONE" FLIGHT PLAN INSTRUMENT That providx private pilois with a imple and accurate means of planning 2nd carrying out cress-miintry flight, either /FR, IFR or DVFR, in uccordonce with existno Civil Air Regulatbns. .. THE CONRDINATOR 2. A protractat far nwasurtng c a u n e and b a r ing angles 5. Sftacf for tMarding all fllabt and air contnl &to & ttnHtc Instructions mid mTic>llan*ouv Infonnotfcn ~ i m h ' u i tha conduct OF flight to or the other of these two channds ia assigned to each CAA,tower for control of traffic on the ground; 121.9 is the first choice or primary frequency. When aircraft on the airport are not equipped to transmit to the timer on. the ground control frequency, the pilot may call the tower on the published tower frequency (122.5,122.6,122.7) and request reply on the published ground control frequency (121.7 or 121.9). Because 1 1 7 i not in use at many locations for 2. s ground control, CAA also uses it for other tower functions, such as approach control, at some locations. Airways ownm~.nWtt,tions fS3.1. Galls to CAA conununications atetiom on 122.1 normally will he replied to on the voice feature of the navigation aid, which usually is the o m i range. When the navigation aid is not operating, or open request of the pilot, the reply Â¥wil be on 122.2. Aircraft also m a y use 126.7 as a two-way channel. Planes o p erathg IFR that do not have frequencies to contact Air Route TrafficControl centers directly, will use 122.1 (or 126.7) to obtain necessary ARTC dearancea through the CAA communications - 7. A handsem* gonuin* iÂ¥OthÂSW s 1 W 2 cartytng ç* with ample room to held all of tho oilov* 08 well as oerarKtutlcal chart* 8. 16-pog*Imtniclten manual 9. Important fliflht card 10. M i x map 1. Civil Air Rogulatlani (Fort W). 1 SPECIAL AOPA PRICE stations. CAA communications stations and their personnel offer a multitude of services to the pilot. In addition to providing weather information and obtaining ARTC clearances for the pilot, these men are trained to offer help w t ih regard to orientation problems. They have full information available regarding airports, services, fuel and navfuda; they can handle your flight plan and give you advice on best altitudes to fly. Some stations are equipped with direction-finding equipment to assist pilots who may become confused as to their position. C~n.froi ~oww#-~SS.S, 1SS.6, 1S2.7. ORDER FORM HAWIN COAIRDINATOR CO., 2831-37 Olive Sf., St. Lour 3, Mo. EndoH plea- find G- for . - HAIPIN COAIRDINATOR(S) @ $12.50 math, Including f*d. Tax. The Airruan'~Guide, Radio Facilities Charts, and the Jeppesen charts indicate the frequency that each tower guards. They also indicate the frequencies on which the tower -will transmit, On the aeronautical charts, the first VHF frequency in the information box for the airport i the local control fres quency and the second frequency is the approach control frequency. If you are in doubt as to the tower frequencies, call the nearest CAA communications station on 122.1 and request the information before you get to the airport la this respect, current regulations with regard to VFR operations in control zones, particularly around high-density airports, during borderline Â¥weathe conditional make it desirable that commQnicationa with. the tower be estab- lished prior to a VFR flight arriving in the control zone. Uniwm, ~ e r v i c e à ‘ I Z S . and l f l . 9 . Most pilots are familiar with the operation of the original Unicorn channel (122.81, which the FCC licensee to airports where there are no control towers. The frequency 123-0 may be licensed for essentially the same d c e a at airports that do have control towers. T o dear up some confusion that has arisen in the past, 122.8 has not been authorized by FCC for use as a traffic control channel; neither has it been authorized . as a search and rescue frequency. Radar service-how to obtain it with limited ehannela. Pilotfs W r i n g radar service, and whose planes are not ,, equipped w t the published two-way ih frequencies normally used for this a m ice, may establish and maintain cornmunications with various radar facilities in the following manner: 1 C m t r ~towers fSO-wile range). Di. l rect the request for radar a d e e -to the control tower using She published airto-ground frequency (122.5, 1 2 6 or 2. 122.7) used by the tower for local contirol. The controller wl advise the pilot il of the frequency to guard in order to receive the radar operator. The aircraft transmitter remains on 122.6, 122.6 or 122.7, as the case may be. à 2. Air Roitte traffic control m t e r s (ARTC) (70 to 100-wti;e range). Direct the request for radar service to the communications station at the ARTC center location, using 122.1. The communicfttions station will inform the pilot on the voice feature of the VOR (or on 122.2) of the ground-to-air frequency to which the pilot should tame his receiver. The pilot should change his transmitter to 121.6 to acknowledge the radar controller's transmissions. 3. RAPCON radar u ~ i t s (SO-Wlie ranye). Direct the request for radar service to the RAPCON using the frequency 1 2 6 I you know his frequency, 2.. f specify reply on that channel, otherwise specify reply on the emergency frequency 1 1 6 which the radar controller 2., Â¥wiluse to give the pilot the regular frequency. 4. Air Defense Radar (Lmg range). Aircraft not equipped to operate on 133.2, which is the frequency normally used for this function, may transmit and receive on 1 1 6 If you do not know 2.. the code name of the facility that you wish to contact, use the following callup "STARGAZER THIS I (aircraft S identification) POSITION , HEADING IFS (or VFR) FLIGHT PLAN, OVER." The S T A S GAZER is a special c l sign which al automatically indicates a request for radar advisory service. After contact is established, u e the call sign of the s radar station that responds. 6. Other radar factfittea. There are many other radar installations at mUitary bases, "most of which guard 131.6. For other than emergency use, care should be taken to determine what rerestrictions or conditions pertain to civil use of the military facility. B:1 ., THE AOPA PI107
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