Furuno FR-8111, FR-8251 manual Presentation Mode, Selecting presentation mode

1.4 Presentation Mode

This radar has the following presentation modes:

Relative Motion (RM)

Head-up: Unstabilized

Course-up: Compass-stabilized relative to ship’s intended course

North-up: Compass-stabilized with reference to north

True Motion (TM)

North-up: Ground or sea stabilized with compass and speed inputs

Selecting presentation mode

Each time the MODE key is pressed, the presen- tation mode and mode indication at the upper- left corner of the screen change cyclically.

Loss of gyro signal

When the gyro signal is lost, the presentation mode automatically becomes Head-up and the HDG readout at the screen top shows xxx.x. The x's do not disappear even when the gyro signal is restored, to warn the operator that the readout may be unreliable.

Match the gyro readout with the gyrocompass reading. Press the MODE key.

Presentation mode,						Description
representative display
H	340	350	000	010 020		A display withouth azimuth stabilization in which the
E	330				030	line connecting the center with the top of the display
	320				040
A	310				050	indicates own ship's heading.
D	300				060	The target pips are painted at their measured distances
	290				070
U	280				080	and in their directions relative to own ship's heading.
P	270				090	The short dashed line on the bearing scale is the north
	260				100
	250				110	mark and it indicates compass north.
	240				120	Failure of the gyro will remove the north marker and
	230				130
						the HDG indication shows "xxx.x".
	220				140
	210				150
	200	190	180	170	160
C	340	350	000	010	020	An azimuth stabilized display in which a line con-
						necting the center with the top of the display indicates
	330				030
O	320				040	own ship's intended course (namely, own ship's
U	310				050
						previous heading just before this mode has been
R	300				060
						selected).
S	290				070
E	280				080	Target pips are painted at their measured distances
	270				090
						and in their directions relative to the intended course
U	260				100
						which is maintained at the 0-degree position while the
P	250
					110	heading marker moves in accordance with the ship's
	240
					120	yawing and course changes. This mode is useful to
	230				130	avoid smearing of picture during course changes. After
	220				140
						a course change, press the SHIFT ZOOM key to reset
	210				150
	200	190	180	170	160	the picture orientation if you wish to continue using
						the Course-up mode.
						If the gyrocompass fails, the presentation mode changes
						to the Head-up mode and the north marker disappears.
						Also, the HDG readout at the screen top shows xxx.x.

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