- The equipment covered by this specification shall perform a navigation function by utilizing information from the Very Low Frequency global OMEGA navigation system, automatically and continuously with minimum operator assistance. The set also has the capability of providing processing functions, according to specific applications, for other navigational and display equipments when the necessary computer program and interfaces are provided.

- The equipment covered in this specification shall consist of the following items:

    Receiver-Computer Group             OR-133(V)/URN                         3.5.1
    Control-Indicator                   ID-1776/ARN-99(V)  ID-     /ARN-99(V)3.5.2
    Antenna-Coupler                     AS-2623/ARN-99(V)  AS-2623A/ARN-99(V)3.5.3
    Mounting Base, Electrical Equipment MT-4738/ARN-99(V)                     3.5.4

These items can be interconnected in the various system configurations defined in Table I. See Specification MIL-N-81675(AS) for AN/ARN-99(V)1.

- This equipment shall operate with the associated equipment listed in Paragraph 6.6.