Raymarine C140w, C90w manual Using radar 117

Tuning method		Related Options	Description
Enhance Echoes		INT. REJECTION:	The enhance echoes
functions:		• ON — minimizes	functions enable you to
•	Interference		minimize the negative
		the effect of	effects of echoes on the
	rejection — this	interference from	radar display.
	function minimizes	other radar-equipped
	the effect of	vessels. There
	interference from	are two settings —
	other radar-eqipped	NORMAL, and HIGH.
	vessels.	• OFF — allows you to
•	Expansion —
		detect the presence
	enables you to	of other radars in the
	override the default	vicinity.
	radar pulse length,	EXPANSION:
	providing larger target
	returns.	• ON — increases the
•	Wakes — enables	pulse length, giving
	you to see the	larger target returns
	direction and speed	that are easier to
	of moving targets	see. However, larger
	relative to your	returns may decrease
	vessel.	target resolution,
		and merge on the
		display. There are
		two settings — LOW
		and HIGH.
		• OFF — this is the
		default setting. It
		provides better range
		resolution,giving
		you more defined
		(but smaller) target
		returns.

Tuning method	Related Options		Description
	WAKES:
	• ON — you can see
		the direction and
		speed of moving
		targets relative to
		your vessel. Targets
		are displayed in
		yellow, turning to
		paler shades of
		blue as the signal
		diminishes. The
		options are: 10 sec,
		30 sec, 1 min, 5 min,
		10 min.
	• OFF — you will NOT
		be able to see the
		direction and speed
		of moving targets
		in relation to your
		vessel.
Tune control	•	AUTO — the	The radar tuning control
		default mode.	enables you to fine-tune
		The radar tunes	the radar scanner’s
		itself automatically	receiver for maximum
		on all range	target returns on the
		scales. Raymarine	display.
		recommends that
		you leave the tune
		function in AUTO
		mode to receive the
		maximum signal.
	•	MANUAL — enables
		you to manually set

Using radar 117