Your visual observer has a hearing impairment that makes voice radio unreliable for him. According to AC 107-2A, how should you handle this?
Correct
The answer is B: Set up another effective way to communicate, such as sign language
Part 107 requires the remote PIC, the person manipulating the controls and the VO to communicate effectively. AC 107-2A says that when a hearing or speaking impairment would get in the way, the remote PIC must use an alternative means of effective communication, and gives sign language as an example. The impairment does not automatically disqualify the VO, but seeing the drone alone is not enough.
Why not ?
Source: AC 107-2A 5.6.1 14 CFR 107.33(a) ACS UA.I.B.K3
Show the answer
The answer is B: Set up another effective way to communicate, such as sign language
Part 107 requires the remote PIC, the person manipulating the controls and the VO to communicate effectively. AC 107-2A says that when a hearing or speaking impairment would get in the way, the remote PIC must use an alternative means of effective communication, and gives sign language as an example. The impairment does not automatically disqualify the VO, but seeing the drone alone is not enough.
Source: AC 107-2A 5.6.1 14 CFR 107.33(a) ACS UA.I.B.K3