Not sure about the "R", but the "UTA" portion stands for Unit Training Assembly, which would be your drill weekends. UTA-4 being a standard two day drill, and UTA-5 being a 2-1/2 day drill, IIRC.
There is the Army National Guard and the Air National Guard.
No. There is only an Army National Guard and an Air National Guard.
No the National Guard does not have submarines. The National Guard is primarily a ground fighting organization. The Air National Guard does provide for air support within the US.
There are actually two National Guards, but when people say the National Guard they are probably (but not necessarily) talking about the Army National Guard. The other National Guard is the Air National Guard which is to the Air Force what the Army National Guard is to the Army.
Hutchinson Air National Guard Base was created in 1942.
Hutchinson Air National Guard Base ended in 1967.
The Army National Guard and Air National Guard do work together. Although, most missions are different and require that they work on different tasks. You will most definitely see Army and Air National Guard working together on a big project.
I did not know an aircraft can crash the Alabama Air National Guard.
Harrisburg Air National Guard Base was created in 1917.
Rickenbacker Air National Guard Base was created in 1942.
Portland Air National Guard Base was created in 1940.
Savannah Air National Guard Base was created in 1941.