23. Recording Functions
23-5
Recording positions
The operator may manually save positions to the voyage log in various ways. These are:
• Direct sensor position (GPS, Loran, etc.)
• Positions calculated by the system (in example below such are Kalman filter and Dead reckoning)
• User observations. (Visual, astronomical and MFDF. MFDF is Medium Frequency Direction Finder.)
An example of saving direct position or position calculated by the system
FURUNO
An example of saving position based on operator observation
First you should locate the position of your observation on the ECDIS chart. Use, for example, the two separate EBL
and VRM available in the Nav Marks dialog box. Open the Sensors dialog box then click the Record tab. Choose
appropriate method from the Device list box. In case a User Observation is selected, put the cursor on the desired
location on the ECDIS display then press the left mouse button. The latitude/longitude position of the cursor is then
copied to the Lat and Lon fields. If you are satisfied, then click the Record button to save the position observation
into the voyage log. If you wish you can also enter Lat and Lon values manually.
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