Here is an interesting development with possible Coast Guard implications:
“The company (Northrop Grumman) has received a $517 million Army contract to build up to three of the huge military airships, called the Long Endurance Multi-Intelligence Vehicles (LEMV). Such airships would serve as surveillance stations at 20,000 feet (6,096 meters) above sea level and could stay on watch for as long as three weeks at a time.”
Chuck Hill's CG Blog 
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I, for one, cannot wait to add the term “helium head” to the lexicon of airdales. With the possibility of five new styles of “wings” to be worn I am sure it will attract many to low and slow flights.
Here is another article about the Navy/CG testing. http://www.naval-airships.org/Content/Documents/Document.ashx?DocId=106291