From the article it reads.....
The Southeast Missourian - Jul 8, 1937
Ray Havens, Conrad creamery worker, phoned the Great Falls Tribune that at 9:40 p.m. Wednesday, he heard a man's voice giving a position and saying "all's well."
A few minutes later, he said, he picked up a second message, which he gave as follows: "Position 173 west longitude and 5 south latitude."
This is ironically a location between Gardner and Hull Islands. I wonder if someone from that Coconut Operation on hull tried to rescue him and tried to make it back to Gardner and Failed. Assuming those coordinates are correct, it seems strange that someone would make a radio call in the middle of the ocean in those days unless he was in a ship or a plane at that time (after all, radios in those days were the heavy tube type).
I have attached a picture showing the location.