Furuno FR-1710 manual Selecting the Range Scale, Screen shows

Presentation mode,						Description
representative display
North				Heading		True Motion Mode
marker
				line
	350	000	010		Heading	Own ship and other moving objects move in accord-
330				030
					marker
340				020		ance with their true courses and speeds. In ground
320				040
						stablized TM, all fixed targets, such as landmasses,
310					050
300					060	appear as stationary echoes. In the sea stablized TM
290					070	without set and drift input, the landmass can move on
280					080	the screen.
270					090
260					100	When own ship reaches a point corresponding to
250					110	75% of the radius of the display, the own ship is
240					120	automatically reset to a point of 75% radius opposite
230					130	to the extension of the heading line passing through
220				140		the display center. Resetting can be made at any
210				150		moment before the ship reaches the limit by pressing
200 190		180	170	160
						the [SHIFT] key. Automatic resetting is preceded by a
						beep sound.
						If the compass fails, the presentation mode is
						changed to the head-up mode and the north marker
						disappears. The HDG readout at the top of the
						screen shows xxx.x°.

North

Heading	340	350	000	010	020 marker		340	350	000	010	020		340	350	000	010	020
	330				030		330				030		330				030
line	320				040		320				040		320				040
310					050	310					050	310					050
300					060	300					060	300					060
290					070	290					070	290					070
280					080	280					080	280					080
270					090	270					090	270					090
260					100	260					100	260					100
250					110	250					110	250					110
240					120	240					120	240					120
230					130	230					130	230					130
	220				140		220				140		220				140
	210				150		210				150		210				150
	200	190	180	170	160		200	190	180	170	160		200	190	180	170	160

(a) True motion	(b) Own ship has reached a
is selected	point 75% of display radius

(c)Own ship is automatically reset to 75% of radius

Automatic resetting of own ship position in true motion mode

1.11 Selecting the Range Scale

The range selected automatically determines the range ring interval, the number of range rings and pulse repetition rate, for optimal detection capability in short to long ranges. You can select pulselength with the ECHO control. For details, see para- graph 1.13.

Press the [RANGE] key to select a range scale. The range, range ring interval and pulselength appear at the top left corner of the display.

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