TM 1-1680-359-10
2-7.  OPERATING PROCEDURE (Cont)
(12)
Check for presence of earphone and check earphone case and cover.
(13)
Replace antenna in stored position.
NOTE
Radio set AN/PRC-90 is used only for emergency (and/or tactical) communications.  The radio
can  be  expected  to  perform  properly,  assuming  normal  maintenance  has  been  kept  current.
The following operational modes are available:
2-42