Seiwa SW AP01 User Manual
Page 50
AUTOMATIC SENTENCE SELECTION
For navigation inputs, the system looks for groups of sentences in this order:
RMB
APB
APA
BOD and XTE
The search stops when the first sentence in the list is found. If it reaches BOD/XTE,
and only one of these is present, the autopilot operates from the data in that sentence.
For wind vane inputs, the system looks for sentences in this order:
MWV
VWR
Note that the MWV sentence should contain the symbol R
following the wind angle field.
For a digital heading input, the system looks either for the HDG or HDT sentence,
depending on which one is selected in the Menu 3 option. Variation and deviation
fields are not read.
OUTPUT DATA
The system outputs heading data in either the IIHDG sentence (without deviation or
variation data) or as IIHDT, using the magnetic variation set within the autopilot. The
repetition rate is a minimum of 8 per second.
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