Furuno FCV-1200L Operator's Manual page 59

SONDE GRAPH
Turns on/off the net sonde water temperature graph.
Horizontal lines
show depth.
Net sonde water temperature graph (at the left-hand side of display)
GRAPH MODE
Selects the display starting position of the net sonde water temperature graph. SURFACE is the
first-water temperature (surface condition); BOTTOM the last-written water temperature (net
sonde position). The display range is 12 °C and scale interval is 5 °C. For example, if the surface
water temperature is 18 °C, the first temperature scale would be 10 °C-20 °C and the display
range is 9 °C-21 °C. If the water temperature drops by 9 °C, for example, the next temperature
scale would be 0 °C to 10 °C and the display range –1 °C to 11 °C.
10 15 20
0 5 10
Water temperature
graph
3-11