I’m another victim of reading the federal regulations, checking with NMC and having inaccurate info! If I read https://www.gpo.gov/fdsys/pkg/CFR-2010-title46-vol1/pdf/CFR-2010-title46-vol1-sec11-910.pdf ; pre final rule requirements do not include Cel Nav any body by the regs. I called to confirm that I was studying the appropriate info about 8 weeks ago. Confirmed by whoever fielded my call at NMC. Old CFR applies to testing under the old rules.
However today, I sat for the 500 Mate Oceans and was not prepared for about 80% questions regarding: ocean sailing routes (mercator sailing) & calcs/LOPs by stars. I was prepared to test for celestial by the sun only, ocean plotting not included.
I had about 3 questions on Sun based Cel Nav… the rest was beyond the scope of the CFR.