Collins Aerospace: Navigational Grade MEMS IMUs Collins Aerospace is a major American defence and aerospace supplier that was formed in 2018 through a merger of Rockwell Collins and UTC Aerospace Systems. It is a subsidiary of the RTX corporation (formerly known as Raytheon Technologies). Part of its product lineup includes highly sensitive navigational grade MEMS inertial measurement units (IMUs). Collins Aerospace: Navigational Grade MEMS IMUs