DESCRIPTION OF MAJOR COMPONENTS.

TM 55-6605-263-14&P

1-8.

a. Directional Gyro CN-998B/ASN-45.

FIGURE 1-2. DIRECTIONAL GYRO.

(1)

The Directional Gyro (Figure 1-2) is contained in a sealed unit and mounted on a base. The Gyro base

contains the cable connector, hemisphere selector, and latitude adjustment potentiometer.

(2)

The Gyro is a case-level gyro in which the Gyro assembly (inner gimbal) maintains a level, or upright

position within the gimbal ring (outer gimbal). Changes in watercraft heading are reflected by corresponding changes in

the position of the inner gimbal with respect to the outer gimbal. This heading change is fed to the angle position

indicator and is reflected in degrees and minutes.

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