Furuno GP-1610CF manual GPS Operations, GPS Setup Menu, GPS Setup menu description

GPS OPERATIONS

11.1 GPS Setup Menu

The GPS setup menu provides for the setting up of GPS-related operations.

1.Press the MENU key.

2.Press the [0] key.

3.Press the [7] key.

GPS SETUP

GPS SMOOTHING
	Posn	000 (000~999)
	Speed	000 (000~999)
GEODETIC
			WGS-84			OTHER (002)
	POS CALIB		0	0.000’N		00.000’E
UNHEALTH			RSTR
						DISABLED			( _ _ )
					_ _		_ _	_ _		_ _
					_ _		_ _	_ _		_ _
TIME DIFF		+09: 00
	: Cursor					: N/S, E/W, +/-
				ESC: Esc

Figure 11-1 GPS setup menu

GPS SETUP menu description

GPS POSITION SMOOTHING: When the DOP or receiving condition is unfavorable, the GPS fix may change greatly, even if the vessel is dead in water. This change can be reduced by smoothing the raw GPS fixes. A setting between 0 and 9 is available. The higher the setting the more smoothed the raw data. Note however that too high a setting slows response time to change in latitude and longitude. This is especially noticeable at high ship's speeds. "000" is the default setting; in- crease the setting if the GPS fix changes greatly.

Latitude

Raw position fix after smoothing

Longitude

Figure 11-2 GPS position smoothing

GPS SPEED SMOOTHING: During posi- tion fixing, ship's velocity (speed and course) is directly measured by receiving GPS satel- lite signals. The raw velocity data may change randomly depending on receiving conditions and other factors. You can reduce this random variation by increasing the smoothing. Like with latitude and longitude smoothing, the higher the speed and course smoothing the more smoothed the raw data. If the setting is too high, however, the response to speed and course change slows. "000" is the default set- ting; increase the setting if the GPS speed changes greatly.

Speed(kt)

Raw position fix after smoothing

Time

Figure 11-3 GPS speed smoothing

GEODETIC: Select the geodetic chart sys- tem you are using. WGS-84 (standard GPS chart system) can be directly selected. For other charts, select OTHER and enter chart number referring to Geodetic Chart List in the Appendix. For sake of accuracy, the chart sys- tem selected here should be the same as that of the cart card used. (See page 10-3.)

POS CALIB: You may apply an offset to position generated by the internal GPS re- ceiver, to further refine position accuracy. For further details, see "10.2 Offsetting GPS Po- sition."

11-1