The Oceanographic Data information dialog allows for the input of Sea Surface Temperature Measurement Type (code Ss), Sea Surface Temperature (code TwTwTw), and Ship's Course'(code Ds), Ship's Average Speed (code Vs). and Sea Surface Sensor Depth (not coded) .

Sea Surface Temperature -

Definition: Sea Surface temperature to tenths of a degree Celsius. The temperature to be observed is that of the sea surface representative of conditions in the near-surface mixing layer underlying the ocean skin.

Method of Measurement: Engine room intake thermometer, hull mounted contact sensor thermometer, bucket thermometer.

Dialog Operation: The Sea Surface Temperature is recorded in the edit box in Celsius up to tenths of a degree. The code TwTwTw is the temperature to tenths of a degree without the decimal point or sign.

Sea Surface Temperature Measurement Type -

Definition: This value indicates the sign of the temperature and how it was measured.

Method of Measurement: Engine room intake thermometer, hull mounted contact sensor thermometer, bucket thermometer.

Dialog Operation: Select the appropriate description in the list box using the mouse or the up/down arrow keys. Code Ss is then automatically determined.

Sea Surface Temperature Depth -

Definition: The depth of the sea surface thermometer. If sensor depth is 10 meters of more, record TwTwTw on the record, but it is not transmitted as part of the radio weather report.

Dialog Operation: Select appropriate radio button using mouse.

Definition: It is the ship's course made good during the three hours preceeding the time of observation.

Method of Measurement: If the ships course has been constant during the three hours preceeding the time of observation, then Ds is the actual course however if the course has altered then it is the course made good.

Dialog Operation: Select the appropriate description using the mouse or the up/down arrow keys. Code Ds is then automatically determined.

Definition: It is the ship's average speed made good during the three hours preceeding the time of observation.

Method of Measurement: It is determined by calculating the distance travelled in nautical miles in during the three preceding hours and then dividing by three.

Dialog Operation: Select the appropriate description from the list box using the mouse or the Up/Down arrow keys. Code Ds is then automatically determined.