Furuno FR-8251, FR-8111 manual Description

Presentation mode,											Description
representative display
N		330	340	350		000		010	020		Target pips are painted at their measured distances
O									030		and in their true (compass) directions with reference to
		320								040
R	310									050	own ship, north being maintained at the top of the
T	300									060	screen. The heading marker moves according to ship's
H											heading.
	290									070
	280									080
U	270									090	If the gyro fails, the presentation mode changes to
P	260									100	the Head-up mode and the north mark disappears.
	250									110	Also, the HDG readout at the screen top shows xxx.x.
	240									120
	230									130
		220								140
		210	200						150
				190		180		170	160
T		330	340 350			000		010	020		Own ship and other moving objects move in accordance
R									030		with their true courses and speeds. All fixed targets,
		320								040
U	310									050	such as landmasses, appear as stationary echoes.
E	300									060	When own ship reaches a point corresponding to 75% of
	290									070
M	280									080	the radius of the radar display, the sweep origin
O	270									090	is automatically flipped (reset) to 50% radius opposite
T	260									100	to the extension of the heading marker passing
I	250									110	through the display center.
O
	240									120	Sweep origin may also be reset automatically, in which
N
	230									130
											case the sweep origin is automatically reset to 50%
		220								140
		210	200						150		radius opposite on the extension of the heading marker
				190		180		170	160		passing through the display center.
											If the gyrocompass fails, the presentation mode is
											changed to the Head-up mode and the north marker
											disappears. Also, the HDG readout at the screen top
											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
	marker	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 50% of radius

Automatic resetting of sweep center in true motion mode

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