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COLONIAL AIRLINES, INC.

May 28, 1948

CORRECTION LETTER 4S      

TO: Flight Personnel,Dispatchers, Ground Radio Stations.

FROM: Vice-President, Operations

1. May 24---Charleston SC ILS. on or about June 3, 1948 the compass locator middle marker site will be commissioned on 219 kcs. Identification Quote William, Unquote dot dash dash. Located 3436 feet NW of NW end of NW-SE runway on extended centerline. + Identification of Charleston SC ILS LCZR on 110.3 mcs changed from Charlie Sugar to Charlie How Sugar.

2. May 25---Norfolk ILS. GLIOK 1905E +. Norfolk ILS Norfolk Va. commissioned on May 21. Will serve NE/SW runway. Approach from SW inbound bearing 43 Degs Magnet, magnet declination 6 Degs west. Localizer located 1000 ft NE of NE end of runway on extended center line at Latd 36-54-07 north long 76-11-35 west. Elevation 13 ft MSL. Frequency 109.9 mcs. Channel 6-Yoke. Identification ORF comman Oboe Roger Fox. Voice feature will be added at later date. Glide Path located 1350 ft NE of the SW end of runway and 400 ft SE of runway centerline. Frequency 333.8 mcs. Channel Y-Yoke. Glide path angle 2.5 degs. Alt over outer marker 1050 ft. MSL Middle Marker 220 ft. MSL Middle Marker located 3350 ft. SW of approach end of NE/SW runway at Latitude 36-53-54 North Longitude 76-12-44 West. Elevation 15 ft. MSL. Frequency 75 mcs modulated at 1300 CPS keyed Alternate dots and dashes Outer Marker located 4.2 Miles SW of approach end of NE/SW runway at Latitude 36-50-25 North Longitude 76-15-06 west. Elevation 5 ft. MSL. Frequency 75 mcs modulated 400 CPS keyed continuously at rate of two dashes per second. Compass Locator at OM site operates of 391 kcs. Identification O Oboe. Class ILSW-GP-MM-OM-OMK.

3. May 26---Richmond ILS. Locau 2225 E | Middle and Outer Markers CMSND May 21, 1948. Operating frequency 75 Mcs. Middle Marker 3574 ft SW of approach end of NE/SW runway at Latitude 37-29-27 N Longitude 77-20-12WElevation 165 ft MSL. Modulated 1300 cycles per second keyed alternate dots and dashes. Outer Marker located 4.36 miles SW approach end of NE/SW runway at Latutude 37-27-45 N Longitude 77-23-34WElevation 160 ft MSL. Modulated 400 cycles per second keyed two dashes per second. See AIRGI VOL 3 NR 4.

4. May 27---New York International Idlewild Airport. Airport Traffic Control Tower at the New York International Idlewild Airport NY to be commissioned as CAA Facility 0700 E June 1, 1948. Hours of operation 0700 E to 1900 E June 1 to June 6. Twentyfour hour operation effective 0001 E June 7, 1948. Transmits on 239 kcs 119.1 mcs 118.1 mcs 121.9 mcs. REceives 3117.5 kcs 6210 kcs 3105 kcs 4495 kcs 118.1 mcs 119.1 mcs 121.9 mcs.

B. T. Dykes