Other major changes were limited to ejection seats instead of Mercury's escape tower and the environmental control system, in essence two Mercury systems hooked together. 另外的大改動(dòng)就是將墨丘利飛船的逃生保護裝置和環(huán)境控制系統改為彈射座位,實(shí)質(zhì)上是將兩個(gè)墨丘利系統連接在一起。