Raymarine C140w, C90w manual Using radar 115

Tuning method	Related Options	Description
FTC function	• ON — enables the	Enables you to remove
	FTC function and	areas of clutter at a
	allows you to adjust	distance from your
	the setting between 0	vessel. It also helps you
	and 100%.	to distinguish between
	• OFF — disables the	two very close echoes
		on the same bearing,
	FTC function. This is
		which may otherwise
	the default.
		merge and appear
		as one echo. You can
		adjust the intensity of the
		FTC function between 0
		and 100%:
		•	A higher setting
			shows only the
			leading edge of large
			(rain clutter) echoes,
			while the effect on
			smaller (ship) echoes
			is only slight.
		•	A lower setting
			reduces background
			noise and fill-in
			returns from land and
			other large targets.

Tuning method	Related Options	Description
Rain function	• ON — enables the	The radar scanner
	Rain function and	detects echoes from rain
	allows you to adjust	or snow. These echoes
	the setting between 0	appear on screen as
	and 100%.	countless small echoes
	• OFF — disables the	continuously changing
		size, intensity and
	Rain function. This is
		position. Turning the
	the default.
		rain clutter function
		ON suppresses the
		bulk effect of rain
		returns from around
		your vessel, making
		it easier to recognize
		other objects. You can
		adjust the intensity of
		this setting between 0
		and 100%.

Using radar 115