A publication of the National Air Traffic Controllers Association
Issue link: http://natca.uberflip.com/i/862302
For SIDs and STARs previously drawn as NTS schematics, for readabil ity, the Location, Proximity, relative Alignment and Length of Flight Tracks can be adjusted compositionally to allow for a clear but 'artificial' depiction of the symbols and text. On To - Scale charts where a large Scales (i.e. 1 inch = 30 NM) result in compressed locations of Fixes and Shortened flight tracks, a clear Depiction of Holding Pattern symbols might not be possible due to congestion or overprint due to Fixes being shown at true location and associated tracks drawn to true length. (For example, on a chart drawn at 1" =30 NM, a 10 - mile - long track is only 0.33" long. A holding pattern symbol is 0.5" long.) Some SIDs & STARs involve multiple Holding Patterns, sometimes f our or more. When unable to depict Holding Pattern symbols in true locations, In sets are used instead of placing the Symbol and Bearings at the Fix. Pilots who "Zoom - In" to an electronic display of the chart often overlook HP inset(s) remotely located along the neat line of the Plainview graphic. The absence of the Holding Pattern s ymbol at the Fix has confused some pilots when instructed to hold. Consideration is being made to improve the association between the Fix and the applicable Holding Pattern inset when the HP Symbol is otherwise shown remotely in an inset. (I.e. Text Labe ls, Ball Notes, HP icon, other?) Consideration is also being made on ways to improve the Depiction and Arrangement of remotely located Holding Pattern insets (i.e. Alphabetical by Name, by Sequence, placed in Proximity to the Fix (es), grouped together, o ther?) GRID MORAs Grid MORAs are normally based on 1 degree of Latitude - Longitude intervals Scale of the chart Plainview directly affects Size and Number of Lat - Long Grids Charts with large scales resulted in Too Many Grid MORAs Excessive numbe rs of Grid MORAs adds Visual Clutter and affects Readability Specification changes made to address association between Scale - Grid Intervals For charts with large scales, larger Grid MORA intervals (2 degrees). GRID MORA DEPICTION ISSUES Some feedback i ndicated Grid MORA values were too prominent. It was suggested the screen percentage and color be modified slightly. Consideration is being made to modify the density and color. In general, depiction issues related to color present complex challenges, in cluding electronic displays in Day vs. Night modes. (For example, lightening the color of a