Final answer:
An Army aviator with less than 50 hours of weather experience cannot legally depart under the given weather conditions.
Step-by-step explanation:
In this scenario, the Army aviator has less than 50 hours of weather experience as the pilot in command. The weather observation at G Pad indicates 100 ft overcast, visibility of 1/8 mile fog, and runway visibility range (RVR) of 1400 ft. According to FAA regulations, under these weather conditions, pilots must have an instrument rating and meet certain minimums to legally depart. An Army aviator with less than 50 hours of weather experience is unlikely to meet these requirements and it would not be legal to depart from G Pad under these conditions.