Thank you for all the information. I am familiar with most of it though. I went to military school for 6 years from 7th thru 12th grade. It is amazing how many flags I have folded. You are correct on all parts. It is amazing all the procedures and etiquette that exists re the flag. According to the AP guide to style and Lible Manual that I used in college, 82 - 86, Half Staff is a land based flag pole and Mast is Sea based. I believe that if on a Navy base they may still refer to it as a Mast even when on base. In fact that brings an interesting memory. We live near a Naval Air Station , NAS Glenview, that has now been closed. It is now a bunch of houses. 10,000 ft runway 6' thick in some places now gone. It was interesting when I went there for an open house one time and the guard would greet all the visitors and say "Welcome Aboard".

Regarding two flags, US flag is always on top. A state flag or other flag would be flown below and should be smaller in area than the US. There is also etiquette re flying multiple National flags. For example if flying the US flag and a Canadian flag Both flags are to be the same size and area and are to be flown on separate poles at equal height. The US flag is supposed to take a prominant placing on one side of all other flags. I don't think it is between, I can not remember what that placement is supposed to be.

Also a point that is more important and relevant here, For others reference. When hanging a flag flat, from the front of your home or in a window. The flag, when hung vertically should be with the field, stars, hanging on top and to the Left when viewed from the street. I noticed that the flag that was printed in our Chicago Tribune can not be displayed vertically as the field will end up on the right.