Who holds what · as the FAA records the name

Poly Scientific Div. of Litton Industries

Named as the FAA publishes it on its approvals.

Approved to make 3 classes of equipment. FAA spelling: Poly Scientific Div. of Litton Industries.

Equipment approvals technical standard order authorisations

1990-01-01TSO-C5C · Direction Instrument, Nonmagnetic, Gyro-Stabilized Type (Directional Gyro) · * · instruments and avionics

1990-01-01TSO-C4C · BANK AND PITCH INSTRUMENTS · * · other and general

TSO-C6C · Direction Instrument, Magnetic (Gyroscopically Stabilized) · *, * · instruments and avionics

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.