“ I find equally untenable the other possible basis for the Court's action-that petitioner's sporadic work for a few hours on the barge, a minor incident to his continuing employment as a pile driver on the tower, could be found to transform him at the time of the accident into a seaman and a member of the crew of the barge. If the 'standing' requirements of the Jones Act are still to be regarded as having any real content, I can find no room for debate that this individual is not a seaman, unless a 'seaman' is to mean nothing more than a person injured while working at sea. ”

“ The Court of Appeals is said to have erred in holding the evidence insufficient to warrant a jury finding that petitioner was a 'member of a crew of any vessel,' and thus entitled to avail himself of the remedies for seamen provided by the Jones Act. (245 F.2d 440.) See Swanson v. Marra Bros., Inc., 328 U.S. 1, 66 S.Ct. 869, 90 L.Ed. 1045. In view of the fact that it has long been settled that a 'member of a crew' is one who is 'naturally and primarily on board (a vessel) to aid in * * * navigation,' South Chicago Coal & Dock Co. ”

“ Respondent had contracted to install for the United States Government at a site 110 miles seaward of Cape Cod a 'Texas Tower' a triangular metal platform superimposed some 60 feet above the surface of the sea on supports permanently affixed to the floor of the ocean by three caissons, and utilized to operate a radar warning station. ”