The Sper­ry Gyro-Com­pass, by The Sper­ry Gyroscope Co.

How the Earth’s Rotation Is Utilized

Comparison of the Magnetic Compass with the Sperry Gyro-Compass

True North

Freedom From Calculation

Freedom From Compensation

Freedom From Checking Deviation

Influences Due to Magnetism of the Ship

Influences Due to Cargo

Influences Due to Temperature Changes

Influences Due to Roll and Pitch of the Ship

Warning of Unreliability

The Master Compass

The Repeaters

Compass Control-Panel

Motor-Generator

Stor­age Bat­tery

Sperry Recording Compass

Operation

Care

Work­man­ship

Testing

Packing

The Sperry Service Organization

Service Given to the World’s Navies by the Gyro-Compass