It’s San Diego Gas & Electric. For what? EnergyBiz explains:
SDG&E plans to use the drones to monitor and inspect its 26,000 miles of transmission lines, which have over 450,000 trees surrounding them. This will make it easier to observe areas that are inaccessible to helicopters. Due to their small size, inexpensive equipment, low personnel costs, reduced noise, and small environmental impact, drones are considered to be superior to helicopters.
When comparing costs, helicopters are no competition. According to a local news station, two drones equipped with cameras cost a total of $6,000. Leasing a helicopter would require $2,000 per hour.
Source: http://electricalcontractor.com/?p=15473
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