Barometric_Pressure
	<barpres>

	The level of the barometric pressure expressed in 
	inches

	Type: real

	Domain: Barometric_Pressure > 0

	Mandatory if applicable
	Not repeatable

	Parent: Marine_Weather_Condition

Environmental_Event
	<event>

	Any environmental event occuring shortly before or 
	after the data were collected that would affect 
	the current state of the data.

	Type: text

	Domain:
		none
		unknown
		free text

	Mandatory if applicable
	Not repeatable

	Parent: Data_Quality_Information

Marine_Weather_Condition
	<marweat>

	Wind and wave conditions existing over an ocean or 
	lake during the time of data collection.

	Type: compound

	Mandatory if applicable
	Not repeatable

	Parent: Data_Quality_Information

	Marine_Weather_Condition =
		0{Wind_Speed}1 +
		0{Wind_Direction}1 +
		0{Wave_Height}1 +
		0{Barometric_Pressure}1

Process_Step_Citation
	<procite>

	Reference to a published protocol.

	Type: text

	Domain: free text

	Mandatory if applicable
	Not repeatable

	Parent: Process_Step

Range_of_Tide
	<tidrang>

	The difference in height (in feet) between 
	consecutive high and low waters.

	Type: real

	Domain: free real

	Mandatory if applicable
	Not repeatable

	Parent: Time_of_Tide

Supplemental_Tidal_Information
	<tidesup>

	Additional information that is necessary for the 
	completion of this section. If data were collected 
	through tidal cycles, it should be noted here.

	Type: text

	Domain: free text

	Mandatory if applicable
	Not repeatable

	Parent: Tidal_Information

Tidal_Datum
	<tidedat>

	The base elevation defined by a certain tidal 
	phase.

	Type: text

	Domain: free text

	Mandatory if applicable
	Not repeatable

	Parent: Time_of_Tide

Tidal_Information
	<tidinfo>

	Means of encoding tidal information

	Type: compound

	Mandatory if applicable
	Not repeatable

	Parent: Data_Quality_Information

	Tidal_Information =
		0{Type_of_Tide}1 +
		0{Time_of_Tide}1 +
		0{Tide_Table_Reference}1 +
		0{Supplemental_Tidal_Information}1

Tide_Table_Reference
	<tideref>

	Tables which give daily predictions of the times 
	and heights of the tide.

	Type: text

	Domain: free text

	Mandatory if applicable

	Parent: Tidal_Information

Time_of_High_Tide
	<hightime>

	The time of high tide on the day(s) the data were 
	collected. Local time should be used.

	Type: time

	Domain: free time (local)

	Mandatory if applicable
	Not repeatable

	Parent: Time_of_Tide

Time_of_Low_Tide
	<lowtime>

	The time of low tide on the day (s) the data were 
	collected. Local time should be used.

	Type: time

	Domain: free time (local)

	Mandatory if applicable
	Not repeatable

	Parent: Time_of_Tide

Time_of_Tide
	<tidtime>

	Time of low and time of high tides the day(s) the 
	data were collected

	Type: compound

	Mandatory if applicable
	Not repeatable

	Parent: Tidal_Information

	Time_of_Tide =
		0{Time_of_Low_Tide}1 +
		0{Time_of_High_Tide}1 +
		0{Tidal_Datum}1 +
		0{Range_of_Tide}1 +

Type_of_Tide
	<tidtype>

	A classification based on characteristic forms of 
	a tide curve

	Type: text

	Domain:
		semidiurnal
		mainly semidiurnal
		mainly diurnal
		diurnal

	Mandatory if applicable
	Not repeatable

	Parent: Tidal_Information

Wave_Height
	<wavhite>

	The height of waves or swells expressed in feet

	Type: integer

	Domain: Wave_Height > 0

	Mandatory if applicable
	Not repeatable

	Parent: Marine_Weather_Condition

Wind_Direction
	<windir>

	The direction of wind expressed in degrees

	Type: integer

	Domain: 0 <= Wind_Direction <=  360

	Mandatory if applicable
	Not repeatable

	Parent: Marine_Weather_Condition

Wind_Speed
	<windsp>

	The velocity of wind expressed in mph

	Type: integer

	Domain: Wind_Speed > 0

	Mandatory if applicable
	Not repeatable

	Parent: Marine_Weather_Condition

