A majority of UP's 900 or so ES44ACs and ES44AHs are in the 7000-8000 number range. However, 80 of them wound up in the 2500 and 2700 series. These 80 units are all known as Tier 4 "Credit" units. They were ordered after Tier 4 emissions standards were in place, even though they are Tier 3 units, by using "credits" UP had accrued. UP 2747 is one such unit, delivered in late 2016. Here, it is leading the MGJNY around Big Ten Curve on a largely cloudy morning.
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