I had a local aluminum fabricator (specializes in tuna towers/tee tops, etc) fab me up a hinged radar mast about 7' tall. It has stiff legs below the hinge, and the hinge is really a flange with 4 3/8" bolts. Takes a few minutes but handy for sneaking under bridges. Tube is 3" sch 40 pipe.
I don't have the cost as it was rolled in with all the rails and the FB ladder, but the whole package as I remember was pretty reasonable.
Good aluminum welders are artists and my guy was fast!!
You can sorta see it in the avatar pic.
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