August 2013 (UTC) 

 Looks much better. I consider this a pending pass, but there is one major concern remaining: is there a definite source that either this cable, or a permanent replacement, was indeed "opened to commerce", and subsequently used? Any instances? Or did the initial enthusiasm fail to go forward? Crossley mentions that the Bureau of Lighthouses (Dept. of Commerce) was going to take over the system; that should be checked. 

 Note that any changes to navigational aids are published in Notices to Mariner's. This would also note times and conditions of availability, so it would be authoritative. Googling on that turns up one mention (http://earlyradiohistory.us/1963hw28.htm#28sec15, see section 16) that "the project was transferred to the Department of Commerce, which by law was responsible for navigational aids. That Department evinced no interest in the project. The cable was removed from the channel ...." (Howeth, History of Communications-Electronics in the United States Navy.)  

 Another possibility might be to dig deeper into Hanson's business affairs. He had financial backing, the contract the Post mentions as being signed suggests some company which presumably held the patents on the amplifier, and company's fate might provide some clues as to whether any sets were sold or licensed. 
 :~   22:31, 31