Sperry Marine 5016-CA, Operation, Installaion And Service Manual

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Analogue Compass Repeaters 056376/A
Reading off Heading and Source Indication 2-3
Only if no valid heading sentences are received at all, the repeater will
raise an error. The error indicator will flash synchronously with one or
all source indicators to indicate that no active heading data are currently
received. The error indication will last until the valid heading data are
again received. For more details see “Error Indication” on page 3-1.
2.4 Reading off Heading and Source Indication
Read the vessel’s heading off the 360° and 10° cards at the lubber line.
The type of heading source in use (gyrocompass = GYRO, magnetic
compass = MAG or transmitting heading device = THD) is indicated
through the corresponding indicator being lit.
As an example, a repeater indicating a gyrocompass heading of 123.4° is
shown below.
For details regarding indication of invalid heading data see
‘Error Indication” on page 3-1.
WARNING
Risk of using invalid heading data
The heading indication at the repeater is only valid if the error indicator
is off and exactly one of the source indicators is permanently lit.
In case the error indicator in on and one or all of the source indicators
are flashing the heading indication of the repeater must be considered
as invalid and the heading data must not be used for steering the vessel.