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Why Doesn't True Flight Display Aircraft on the Approach Chart ?  
     
  Although putting the aircraft on the approach plate from a business standpoint is cheaper and easier it has a number of important disadvantages (which is why on IFR certified displays it is done the way that we do it)

1. Approach plates must be flown North up. This means for instance if you are flying an approach to the South as an example you will be flying backwards and upside down towards the threshold. Flying to the easterly or westerly will have you flying sideways and or slightly backwards depending on the heading. With the way we display approaches one o'clock on the screen is always the same is one o'clock out the window there is no interpretation necessary it is stone simple. 		approach overlay  

Putting the aircraft on the chart is made from the perspective of the person on the ground who is not interested in navigating the aircraft only tracking it.  Flying the chart is the exact opposite of what you would want to see why you're flying the aircraft. When flying the chart one o'clock on the screen could be six o'clock out the window one minute and then after the next turn could mean three o'clock or nine o'clock. Not helpful for situational awareness.

 2. A chart is literally a picture, why is this important? It's important because from the standpoint of computer it can't see a picture or interpret any of the information on it. This means if you deviate from an altitude it will not alert you, it is not a second set of eyes monitoring the safety of your approach. With our software the data is stored in vector form and will alert you immediately if you deviate from the altitude or get too close to a tower.

Instrument approaches have always represented a high percentage of IFR accidents for the simple reason that if you're flying under actual weather conditions it can be very demanding, in addition you are the most fatigued of the entire flight so your ability to handle a high workload situation is at the lowest point of the entire flight as well, in addition you may have worked all day and are additionally fatigued. That's why the safety margin during an IFR approach is usually the smallest of the entire flight.

Unfortunately we all know someone who was quite a good pilot yet still made a dumb mistake and was involved in an accident. The second set of eyes with our software monitoring your progress and alerting you if you deviate from the approach is exactly what's needed to break the chain of missteps that often are responsible for an accident. The workload needed to fly an approach using our software is incredibly low giving you a much larger margin to concentrate keeping ahead of plane.

  Flight Cheetah

3. The chart method in addition to the problems above also has the other issue in that many of them are not drawn perfectly to scale which means even when you are perfectly lined up it may not show it on the chart properly or vice versa.  In addition the typical chart has between one and two dozen towers with a little tiny text to let you know the altitudes that is a lot keeping your head. The way we show obstacles is they only pop up in red when they become a factor.. 

This approach overlay data is only put together by two companies Jeppesen and True Flight.The reason you do not see other companies use this data is that Jepperson only provides it for certified displays to protect the market. We are the only company that makes it available on a portable display.