Exhibit D Pinnacl X Pilot and Visual Observer Operating Procedure

Multirotor Operating Procedure

The observer and pilot work together to position a multirotor for inspection. Prior to the flight the 

observer and pilot will walk the designated flight area and identify the flight path and alternate flight 

paths around obstacles. Also the team will identify possible forced landing areas in case they encounter 

a problem or emergency. The pilot and an observer will discuss and agree on the approach to a holding 

position at a safe distance away from the filming point. Once the flight path has been identified and 

agreed on, the pilot will fly the aircraft to the holding position near the designated filming point. Next 

the observer will direct the pilot to reposition the multirotor to the filming point for taking photographs 

and or video. The observer will use the real time video to provide guidance to the pilot along with lineof-site. The observer can use first person view, FPV, goggles or video screen. Also the observer should 

position themselves in a different location to see the aircraft from a different angle. The observer should 

move with the aircraft to provide the best vantage point. The pilot should move only when the aircraft is 

in GPS position hold at the holding positon and remain at the same location when the aircraft is within 

close of the filming point or obstacles. The pilot and observer must maintain the communication 

requirements for multirotor aircraft flight as outlined in Table 1. In the event of a failure of one of the 

communications requirement, the pilot will reposition the aircraft to a safe location and request that the 

communication requirements be reestablished. If that is not possible then the pilot will land the aircraft 

and reestablish the communications. 

Table 1, Communication Requirements for Multirotor Aircraft Flight 

1) 10 meter position between pilot and observer. Observer should change positions during the flight for 

the best vantage point. The pilot should only move when the aircraft is at a holding point, not when the 

aircraft is in close proximity of a structure or lines.

2) Pilot and observer must be able to see each other.

3) Pilot and observer must be able to hear each other in a normal tone.

4) Pilot and observer must be in line-of-sight of the multirotor aircraft.

Loss of Communication between Pilot and Observer: 

The pilot and observer will be standing two meters from each other and within visual and vocal range. 

Both the pilot and observer will be in visual line of sight of the multirotor aircraft, table 1. If any of the 

four communication requirements listed in Table 1 are violated the multirotor aircraft will be landed and 

the condition will reestablished before flight. 

Loss of Communication Between Controller and Multirotor Aircraft 

If the communication link between the transmitter and receiver is lost the multirotor aircraft will auto 

land by holding its current position and throttle reduction. The communication link strength is 

monitored continuously and the transmitter will beep if there is a signal strength reduction. If there is a 

significant reduction in signal strength the pilot will immediately fly the multirotor aircraft to a close 

position and or land the aircraft as necessary. 

Additional Safety Features 

The video on screen display, OSD, displays the following data, battery voltage of the multirotor aircraft, 

signal strength between the controller and aircraft, aircraft position and GPS satellite signal strength. Or 

the pilot’s transmitter will display the telemetry. The pilot also can set a timer on the transmitter. The 

controller will also provide an alarm when the battery level is critical or if the multirotor signal strength 

is reduced.