Furuno 1623 manual Watchman, Suppressing Long-range Rain Clutter, How watchman works

1.21 Watchman

Watchman transmits the radar for one minute to check if a target has entered or exited the guard zone from the previous transmission. If no change is found, the radar goes into standby for the number of minutes set for the watchman feature. If change is found, the audio alarm sounds, watchman is canceled and the radar transmits. This feature is useful for extending the life of the magnetron.

	Tx	ST-BY *	Tx	ST-BY *
	1 min	5,10	1 min	5,10
		or		or
		20 min		20 min
Watchman
		* Beeps emitted just before radar transmits.
starts

How watchman works

1.Press the [MENU/ESC] key to open the User menu.

2.Press ▲ or ▼ to choose WATCHMAN TIME from page 2.

3.Press ► to open the options window.

OFF

5min

10min

20min

Watchman time options

4.Press ▲ or ▼ to choose appropriate time out, that is, the amount of time the radar waits in standby, among 5, 10 and 20 minutes.

5.Press the [MENU/ESC] key to close the menu.

1. OPERATION

1.22Suppressing Long-range Rain Clutter

In adverse weather, clouds, rain or snow produce spray-like spurious echoes which impair target detection over a long distance. These echoes can be suppressed by turning on the FTC.

1.Press the [MENU/ESC] key.

2.Press ▲ or ▼ to choose FTC from page 1.

3.Press ► to open the options window.

4.Press ▲ or ▼ to choose OFF or ON as appropriate.

5.Press the [MENU/ESC] key to close the menu.

“FTC” appears at the top right corner when the FTC is active.

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