This is not relevant at all. It is such a small number of (very small) ships that has zero impact on the US Navy.
What the Navy Secretary meant is that perhaps, maybe, it is possible, that after another 6 months or a year or two years of the industry supplying Ukraine, perhaps, maybe, it is possible, that we will have some shortages of some very specialized chips or other materials that are perhaps, maybe, it is possible, they are also used in Navy projects. So we are monitoring the situation, because maybe in 6 months, or in a year, or two years, maybe we will have to increase production for some specialized stuff. Maybe.