Meteorological Initilization Data
Meteorological Initilization Data Information dialog allows for the input of Date
(day of month code YY) and Time (hour code GG), Wind Measurement type (code iw),
Weather Group (code ix), Position (latitude code LaLaLa, longitude code LoLoLoLo,
quadrant code Qc). This dialog also allows for input of observer initials, determination
of units used and comments.
Ship Radio Call Sign -
Definition: Ship's call sign consisting of three or more
alphanumeric characters. This value is taken from the administration file
Dialog Operation: This ship's call sign must be set in the Administration
Report.
Date -
Definition: Year, month and day. Only day of month is used
in BBXX message. All of date information is used in the Archiving
Meteorological Data.
Dialog Operation: Calculated from the computer clock. Can be overi
Dry Bulb
Definition:
Air temperature to tenths of a degree Celsius. It is the
measurement of the heat content of the air.
Method of Measurement:
Thermometer of psychrometer. Take the reading on the windward
side of the ship being sure to protect thermometer from
radiation, precipitation, and spray.
Dialog Operation:
The signed dry bulb temperature is recorded in the edit box in
Celsius up tenths of a degree. The code TTT is the temperature
to tenths of a degree without the decimal point.
Sn is the sign.
Wet Bulb
Definition:
Definition: Wet bulb temperature in degrees Celsius. This is that
temperature at which water evaporated into the air brings the
air to saturation at the same temperature.
Method of Measurement:
Psychrometer. The thermometer must be read as soon as possible
after ventilation or whirling has stopped. Moisten clean wet
bulb muslin on all sides with purest (distilled) water available.
If temperature is below 0 degrees C, the muslin wicking should be covered with a
thin coating of ice.
Dialog Operation:
The signed wet bulb temperature is recorded in Celsius to
tenths of a degree and the signed value is input into the edit
box. The code TbTbTb is temperature to tenths of a degree
without the decimal point. The sign and type of wet bulb
is selected from the list box using the mouse or the up down arrow keys.
Code Sw automatically selected.
Dew Point
Definition:
This is the temperature in Celsius at which condensation will occur
causing dew or frost to form. It corresponds to a relative humidity of 100%.
Method of Measurement:
It is computed from the wet bulb and dry bulb temperature.
Dialog Operation:
It is automatically calculated from the dry and wet bulb.
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