Dead Reckoning function
The Dead Reckoning function is used to improve the position of the track line relative to the actual position of the drifting fishing gear. For this function to operate, the SY50 system requires input from a speed log.
How to open
This function is opened from the Setup menu.
Image
Description
This is an "on/off" function. When switched “off”, the GPS is used to calculate the position of your vessel. When “on”, the position is calculated based on the current speed and the input from the course gyro.
When dead reckoning is switched off, the vessel movement and track line are calculated from the GPS data. These are relative to the bottom. When switched on, the inputs from the gyro and speed log are used to positioning the vessel relative to the water.
Tip
To draw the track line use the settings on the Track Line page. The Track Line page is located in the Display Options dialog box. The Display Options dialog box is located on the Display menu.
The Minute Markers function adds markers to the track line. These markers indicate how far you have sailed in the last few minutes. The minute markers are shown as small circles on the vessel’s track line. The Minute Markers function is located on the Visual Objects menu.