HOWEVER, he now tells me that he has lost confidence in it because it had to have the recalibration. I explained to him that any precision instrument needs to be recalibrated at times, but he is adamant that the Phantom is now unreliable. So... I'm short on reasons why IMU would need to be recalibrated.
The National Highway Traffic Safety Administration estimates that drowsy driving was responsible for 72,000 crashes, 44,000 injuries, and 800 deaths in 2013.4 However, these numbers are underestimated and up to 6,000 fatal crashes each year may be caused by drowsy drivers.5-7.
Weather Impacts on Safety. 1  On average, there are over 5,748,000 vehicle crashes each year. Approximately 22% of these crashes - nearly 1,259,000 - are weather-related. 2  The vast majority of most weather-related crashes happen on wet pavement and during rainfall: 73% on wet pavement and 46% during rainfall.