User's Manual for the Navy Coastal Ocean Model (NCOM) Version 4.0

The version 4 series of the Navy Coastal Ocean Model (NCOM) has been developed at the Naval Research Laboratory (NRL) and transitioned to the Navy Oceanographic Office. New capabilities include a general vertical coordinate (GVC) option in addition to the sigma-z coordinate vertical grid, Earth System Modeling Framework (ESMF) compliance, and several other compile time options that increase the flexibility of the model code. NRL has also begun maintaining NCOM in version control using a Subversion repository. This User's Manual documents the setup and execution of the NCOM version 4.0 series.