Barry,

The version of One More Day that Suzanne sang is one that I found in an issue, I think, of an old English magazine that I can't remember the name of. I was living at Faith Petric's house at the time and had access to her vast store of periodicals submitted to the San Francisco Folk Club. The article specifically referred to the song as being a river shanty, sung slowly as opposed to the deep-sea version. That being said I think you are correct that it fits capstan work and might very well have been adapted as a deep-sea shanty as well.