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Installation Manual
20220737B
27
Indicators
The DR75 has two indicators. One is a four digit liquid crystal
display which displays input heading received from the
transmitting device e.g. Gyro. The second is a horizontal LED
bar graph display that is used either as a rate of turn indictor or
as a steering indicator to show how far of a set course the vessel
is.
Modes
The repeater’s LED bar graph display has three modes of
operation. Modes are selected by depressing both the set switch
and the Dim bar digit simultaneously and is cycled until you
release both switches when the desired mode of operation is
indicated on the LCD display (0, 1 and 2).
The first two modes (0 and 1) are used to select the bargraph
display to act as a rate of turn indicator with a course and fine
setting. This is particularly useful when docking manoeuvres
are taking place.
The third mode of operation selects the bargraph display to act
as a set steering display. The set switch is depressed when the
desired heading to be steered to is reached. When the correct
course is being steered all the indicators are unlit. With each
degree steered off-course the appropriate left or right LED is lit.
The further off the desired course more LED’s are lit until this
ship is on-course and all LED’s are unlit.
Flashing LCD display
If for any reason the heading display starts to flash this indicates
that the data signal which is being sent by the transmitting
device is either not present or not correct. This must be
investigated further.
If the repeater is presented with a correct NMEA 0183 sentence
but not being true heading (HDT), the display will still flash. If a
magnetic heading is presented (HDM), the repeater will display
the heading, but will still flash and respond slowly. The LED bar
graph will not respond.