**Instructions:** enter values for salinity, temperature and
pressure and click on the 'Calculate' button. (Note: 1 decibar equals
10000 Pa, corresponding to roughly 1 metre increase in water depth.)

**Example** at 35 PPT, 5 degC and 10 dbar, expect rho=1027.67547
and sigma-t = 27.6756 (Gill, 1982, Atmosphere-Ocean Dynamics, Appendix
A3.1), potential temperature = 4.9992 degC.