It looks like the U.S. will be sending more advanced shorter range surface to air defense missile systems (NASAMS) to Ukraine, along with “long-range air defense capabilities" of some sort.
It's better than nothing, but it doesn't seem like it's going to be enough to make a huge impact (that's just my impression based on what I've seen being reported from Ukraine, I have no special knowledge when it comes to this).
>>>As for the mention of “long-range air defense capabilities for the Ukrainians” in Sullivan’s statement, that remains a mystery. It may even refer to the future delivery of
Patriot SAM systems, which would provide a highly capable upper-tier complement to the NASAMS, as well as bring a significant anti-ballistic missile capability. At this stage, however, there is no official word on other potential systems that might be headed to Ukraine and this could have been just how he described NASAMS.
In terms of NASAMS performance, the closest counterpart in Ukrainian service is likely the Cold War-era
Buk (SA-11 Gadfly), a highly mobile tracked system that has reportedly been particularly successful but which has also suffered its fair share of attrition. The Buk has a maximum engagement range of 22 miles but shares the same problem as the S-300, in that only limited numbers (if any) are able to be transferred to Ukraine from NATO or other friendly nations.<<<