Provides an interface to the Gibbs 'SeaWater' ('TEOS-10') C library, version 3.05-4 (commit '5b4d959e54031f9e972f3e863f63e67fa4f5bfec', dated 2017-08-07, available at < https://github.com/TEOS-10/GSW-C>, which stems from 'Matlab' and other code written by members of Working Group 127 of 'SCOR'/'IAPSO' (Scientific Committee on Oceanic Research / International Association for the Physical Sciences of the Oceans).
gsw is an R package that provides a connection to the thermodynamic equation of seawater as defined at teos-10.org. An earlier version of gsw was referenced to TEOS-10 version 3.03, but the present one is referenced to version 3.05-4, which is current as of Aug 7, 2017. See the CRAN website for check statistics, etc.
All the gsw functions reproduce teos-10.org test values to a tolerance of 1.5e-8, the default for numerical comparison in R working on a 64-bit machine. (The tests are part of the package-building process, as is usual in R.)
Function names, as well as most argument names, match those used in the TEOS-10 documentation.