When a small UA operation uses a visual observer and a person manipulating the controls, who is responsible for briefing them on the planned emergency procedures before the flight?

Why: The remote pilot in command must ensure that all crew members, including any visual observer and any person manipulating the controls, are properly briefed on the flight and the planned emergency procedures before the operation begins.

• Misassigns the briefing duty to the visual observer, who is briefed by the remote PIC, not the one giving the briefing.
• Confuses having written SOPs with the remote PIC's ongoing, flight-specific duty to brief the actual crew before that flight.