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In heavier conditions, EV may lose some of its ability relative to SV, but what it shows you is what’s actually out there, not what the database says should be out there. EV allows a pilot to see through darkness, smoke, haze, smog, dust, light fog, and even rain. While this sensor comes in a variety of forms, by far the most common is infrared (IR), which senses temperature differences and produces a high quality real-time image of the outside scene. EV uses sensors on the aircraft to “see through” weather or darkness. There are many variables, so it’s worth investigating which one best suits your needs.ĮV may seem like a close cousin of Synthetic Vision, but it’s actually a very different technology.

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You can add it to many popular flight instrument systems or even utilize systems built into accessories like a portable GPS unit, or an app on your tablet. So it is worth investigating how adept a system is at creating and updating that database.īut perhaps the best advantage SV has is its relatively low cost. In other words, your SV system is only as good as the its foundational database. This is probably the biggest issue with SV, because what you’re seeing may not be a 100 percent accurate depiction of the actual While terrain is pretty much static, obstacles are constantly changing. The other potential issue is the quality and currency of the database used to create the virtual world your aircraft is relying on for safe navigation. These GPS issues are not a fault with SV and apply to any

And of course there’s the potential for active interference or spoofing, but that’s usually limited to military action. Although, the FCC has done a great job of shielding GPS frequencies, the possibility exists that someone transmitting on or near those frequencies could potentially jam the GPS. While GPS is usually very reliable, its weak signal is vulnerable to interference. There are two potential faults though - location data and database information. SV designed to improve situational and terrain awareness and is not intended, or authorized, to be used as a navigational system. It’s important to remember that SV is not a navigational system. You could literally paper the windshield of the aircraft (not a suggestion, mind you!) and still see outside. The advantage of this system is that regardless of the weather or light conditions, you will have a “clear view” out of the front of the aircraft. SV uses a detailed and high quality database of terrain features and obstacle data to create a virtual ‘world.’ The SV system uses an accurate aircraft position provided by an on-board GPS to display this virtual world around your aircraft. It relies on marrying technologies already included in many avionics suites and even some hand-held systems. SV is by far the more accessible in terms of cost and equipment. Naturally, each of these approaches has its advantages and drawbacks. EV and SV use very different approaches and technologies to give you a bright and clear picture of the outside world, no matter how dark or cloudy the sky may be. For more information on night vision, please see the articles listed in the Learn More section. While there is some overlap in this technology, this article will focus on Enhanced Vision (EV) and Synthetic Vision (SV), rather than night vision. We now have two technologies that allow us to literally see through the dark and the clouds. Of course they weren’t exactly legit, but who wouldn’t be willing to risk a few bucks for even the slightest chance for such power? Well, as it turns out, the power of “X-ray” vision is not so much of a far-fetched novelty anymore - at least in aviation. These mail-order novelties usually sold for a few quarters, or dollars in the later years. I may be part of the last generations to remember the ads for X-ray glasses that appeared in the back of comic books and magazines aimed at young people. X-Ray Vision and Alphabet Soup - Decoding GA Vision Systems