# ``fm_depth``
## Properties
:dimensions: N_PROF, N_LEVELS
:dtype: float64
## Default Attributes
| Attribute | Value |
|-----|-----|
|``whp_name`` | ``FMDEPTH`` |
|``whp_unit`` | ``METERS`` |
|``units`` | ``meters`` |
|``C_format`` | ``%9.1f`` |
|``C_format_source`` | ``database`` |
## Description
Depth calculated from pressure using the Fofonoff and Millard method, also known as the UNESCO 1983 formula