Thank you, Jason. Good morning, everyone, and thank you for joining our earnings call. Today, we reported record first quarter non-GAAP operating margin, record adjusted earnings per share and record free cash flow. While overall orders remained strong, sales were impacted by deterioration in some of our short cycle imaging and instrumentation market. We have previously assumed no full year sales growth in industrial automation as well as test and measurement market. However, those markets weakened more than planned in the first quarter, and we now forecast full year sales in those product families to decline meaningfully in 2024.
Nevertheless, we believe such sales declines with the offset by our marine, aviation and certain defense businesses, resulting in full year flat sales compared to 2023. Despite those anticipated sales reductions, in what are among our highest margin businesses, we believe overall operating margin will remain flat in '24 versus '23. Within the Digital Imaging segment, year-over-year sales declined due to significantly lower sales of machine vision sensors and cameras related to industrial automation. However, this was partially offset by organic growth and significant margin improvement at Teledyne FLIR.
Given our unmanned system businesses, growth and the resiliency of our core infrared imaging business. Similarly, in instrumentation, we were relatively flat where significant reduction in sales of test and measurement, instrumentation were almost entirely offset by Marine Electronics and unmanned underwater system. And despite the overall flat sales, segment margin increased considerably. In our smallest segment, Engineered Systems, which is largely a U.S. government prime contractor, sales were impacted by the very late approval of the U.S. 2024 budget. We also revised estimated progress and cost to complete on certain contracts, resulting in some revenue and profit reversal.
Finally, given our even stronger balance sheet with quarter end leverage just at 1.7x, combined with record free cash flow, we believe it's an appropriate time for us to add stock repurchases to our capital deployment plan. I will now turn the call over to Edwin and George, who will further comment on the performance of our core business segments.