| Symbol | Description | Uses |
| maskC | cell Center land mask | 777 |
| maskS | South face land mask | 191 |
| MASKS_CONST | 1 | |
| MASKS_FX | 1 | |
| MASKS_FXY | 1 | |
| MASKS_FY | 1 | |
| maskW | West face land mask | 189 |
| MASKW_CONST | 1 | |
| MASKW_FX | 1 | |
| MASKW_FXY | 1 | |
| MASKW_FY | 1 | |
| MAX_INDEPEND | 8 | |
| MERID_TRANSPORT | 1 | |
| MINFE | 2 | |
| ML_2D | 6 | |
| ML_MEAN_LIGHT | 5 | |
| ML_MEAN_PHYTO | 3 | |
| MNC_DEBUG | 1 | |
| MNC_DEBUG_GTYPE | 1 | |
| MOM_BOUNDARY_CONSERVE | 12 | |
| MOM_VI_ORIGINAL_VISCA4 | 4 | |
| MONITOR_TEST_HFACZ | 3 | |
| MULTIPLE_RECORD_KPP_STATE_FILES | 2 | |
| MULTIPLE_RECORD_STATE_FILES | 2 | |
| MY82_SMOOTH_RI | 2 | |
| MYPACKAGE_2D_STATE | 9 | |
| MYPACKAGE_3D_STATE | 9 | |
| MYPACKAGE_TENDENCY | 6 |