Got some photos of 46E/F after flying Economy with the baby (should be similar for row 30 most likely). We sat in the middle since United's own site says E/F are the bassinet seats, but honestly the bassinet probably overlaps into the aisle seat it may be more appropriate to take D/E or F/G as I had originally wondered. We were actually lucky as G seat got upgraded so we had 3 seats and an extra seat with a baby is always a welcome treat.