SAMPLE_TYPE	VARIABLE	LEGAL_VALUES	DESCRIPTION
HYDRO	CAST	UPCAST|DOWNCAST	Line cast direction (UP/DOWN)
HYDRO	COL_LOC		Water column location
HYDRO	CONDUCTIVITY		Conductivity (uS/cm)
HYDRO	DEPTH		Depth at increment (m)
HYDRO	DO		Dissolved Oxygen (mg/L)
HYDRO	LIGHT_AMB		Ambient light (umol/m2/s)
HYDRO	LIGHT_UW		Light UW (umol/m2/s)
HYDRO	PH		Water pH
HYDRO	SALINITY		Salinity. Required for estuarine measurements. Units are parts per thousand.
HYDRO	STATION_DEPTH		
HYDRO	TEMPERATURE		Water temperature °C
HYDRO	TRANS		Light transmission as % transmittance at 1 meter depth.
DESIGN	NCCA_REG	Northeast|Southeast|Gulf|West|Great Lakes|	"National Coastal Condition Assessment Region.  Northeast includes states ME, NH, MA, RI, CT, NY, NJ, MD, DE, and VA.  Southeast includes NC, SC, GA, and east coast of FL.  No missing values allowed."
DESIGN	PSTL_CODE		"State two letter postal code for site sampled. 50 state postal codes plus AS, MP, GU, PR, VI for American Samoa, Commonwealth of Northern Marianas, Guam, Puerto Rico and Virgin Islands.  No missing values allowed."
DESIGN	SITE_ID		"NCCA Site ID for the study and year sampled. Preferred form is NCAnn_MM-xxxxx  where  nn is current cycle year (04, 08, 13, 18, etc), MM is two letter state code, and xxxxx is between 10001 and 99999.  No missing values allowed.  No missing values allowed."
DESIGN	STUDY	Estuarine|Reef_Flat|Near_Shore| Albemarle_Pamlico|	
	PUBLICATION_DATE		Date the dataset was published to the NARS site
	UID		Unique identifier for the site/visit
	DATE_COL		Date the site visit occurred
	VISIT_NO		Sequential visit in each year
	SAMPLE_TYPE		Code identifying sample type