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Coupling
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.. todo::

   The ‘Coupling’ chapter needs to be enriched

NEMO currently exploits OASIS-3-MCT (versions 1 to 4) to implement a generalised coupled interface
(:manhtml:`Coupled Formulation <node50.html>`).
It can be used to interface with most of the European atmospheric GCM
(ARPEGE, ECHAM, ECMWF, Ha- dAM, HadGAM, LMDz), as well as to regional atmospheric models
(WRF, COSMO, Meso-NH, AROME).
To implement the coupling of two independent NEMO components,
ocean on one hand and sea-ice plus other surface processes on the other hand
(:manhtml:`Standalone Surface Module - SAS <node46.html>`).

To enable the OASIS interface the required compilation key is ``key_oasis3``.
You must also add ``key_oasis3_v1v2`` if you use OASIS-3-MCT version 1 and 2.
The parameters to set are in sections ``&namsbc_cpl`` and
in case of using of SAS also in section ``&namsbc_sas``.