The SAF re: RSN officer ranks are all mixed up, as indicated above, and worse, one star Rear Admiral and two star Rear Admiral,
whereas if it is to follow such a system, then there should be a Commodore (one star), Rear Admiral (two stars), Vice Admiral (three stars), Admiral (four stars).
If the RSN is to use that system, then it should discard 2LT, LTA, CPT, MAJ, LTC, COL, Rear Admiral, etc.
and use the following:
Canadian Navy Officer Ranks
http://www.forces.gc.ca/en/honours-history-badges-insignia/rank.page
or
the British Royal Navy
https://en.wikipedia.org/wiki/Royal_Navy_officer_rank_insignia