scope:

- The equipment covered by this specification shall bee designed to couple outputs of Receiver-Transmitter RT-220/ARN-21 to flight instruments for presentation of bearing and distance of an aircraft to a navigation beacon.

- The equipment covered by this specification shall be of one type and shall consist of the following:

Max. Allow. Size Type (Inches) Max. Allow. Applicable Units Designation L W H/D Weight Lbs. Paragraphs Indicator Coupler CU-395/ARN-21A 8-⅝ 7-⅜ 4-5/16 10.4 3.3.1 Mounting Mounting Base MT-1530/ARN-21A 7-5/16 8-⅞ 1-⅝ 0.6 3.3.2

- The equipment shall operate with the following auxiliary equipments; however, these equipments are not to be supplied as part of this equipment:

(1) Receiver-Transmitter RT-220/ARN-21 (2) Course Indicator ID-249A/ARN, ID-351A/ARN, ID-357/ARN, or ID-387/ARN (3) Course Indicator ID-250/ARN (4) Distance Indicator ID-388/APN (5) Navigational Computer CP-( )/ARN-21

intended Use:

- The equipment shall be designed for use in Military aircraft to carry out specific military missions.