A poster on another forum discovered a compelling possible explanation for SBTC and 118,000. Fleet won sail races while a member of the Newport Yacht Club in Newport Beach CA. Captains are always given the longitude with which to begin the race and Newport's is almost exactly 118.00.00. Longitude is written that way, with places for hours, minutes and seconds, and the figure in the RN was written $118,00.00. None of the other amounts were written with zeros for cents. That is also the longitude of where Nancy's family lived and her rape trial.

At the end of races, captains must sign Certificate of Compliances, and part of the wording is S igned B y T he C aptain--S.B.T.C. Some certifcates refer to the "skipper" instead of "captain" and JR may have used those. Many certificates contain key words from the RN--execute, instructions and deviation.

This is the best explanation I've seen for those parts of the RN.