Outdoor events (marathons, trails, courses, etc.) often means length and space:
- Length as these events often last for hours,
- Space because they go off over hundreds of meters or miles.
Many current multirotors can hold up less than 90 minutes, which is well below what many operators need.
In that cases, long-endurance drones like Sunbirds are the best alternative to deliver complete aerial overview of the whole event !