SG or Salinity?

[Oscar]

I am a little confused. Most people on this board and other boards make reference to SG but rarely mention salinity when discussing their water parameters.

Isn't specific gravity just a substitute for salinity? If you know your specific gravity AND temperature then you can calculate your salinity. Quoting SG on its own is meaningless. Isn't it?

I have been tracking salinity and not SG. Although I also record water temperature as well.