Furuno 841 MARK-2 manual Display Indications and Markers, Turning the Radar On and Off, 5NM

2.2 Display Indications and Markers

			Heading (requires
Range			heading data)			Echo trail, AUTO tuning
					TRAIL AUTO
Range ring interval						Echo trail elapsed time,
	0.5		HDG 326.8°		0:00 15S
Presentation mode		1.5NM			G (IN)	echo trail time, tuning indicator
	CU
Off center					FTC1	Guard zone
	OFF				ES
Pulsewidth	CENTER				IR	Fast Time Constant
	SP
						(rain clutter suppressor)
Heading marker						Echo stretch
						Interference rejector
Guard zone
area
						Range ring
Cursor
EBL						VRM
		VRM	EBL	+ CURSOR		Range and bearing to cursor
						or cursor position in latitude
	0.675NM 220.9°R 0.646NM 308.7°R					} and longitude may be displayed
						by pressing the [HM OFF] key.
		VRM	EBL	Cursor	Cursor
		range	bearing	range	bearing

Figure 2-2 Display indications

2.3 Turning the Radar On and Off

Turning the radar on

Press the [POWER] key to turn the radar on or off. The control panel lights and a timer displays the time remaining for warm up of the magnetron (the device which produces radar pulses), counting down from 2:30 to 0:01.

Note: When the power is reapplied within a certain amount of time and circuits remain charged, the warmup process is skipped—you can transmit immediately.

CAUTION

The radar antenna emits high frequency radio radiation which can be harmful, particularly to your eyes. Never look directly at the antenna from a distance of less than two feet when the radar is in operation. Always make sure no one is near the antenna before turning on the radar.

Note: When the heading signal is lost, the HDG readout at the top of the screen shows ***.*. This warning stays on when the heading sig- nal is restored to warn the operator that the readout may be unrealiable. The warning may be erased by pressing the [DISP MODE] key,

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