artisan TRACKPOINT 3 4211A, Operation And Maintenance Manual

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TRACKPOINT 3
3-73
EXPLANATION OF ERROR CODES
CODE DESCRIPTION
51
Pinger Only: This warning applies only when hydrophone offsets are entered and when track-
ing a pinger where its depression angle is < 20° from the horizontal. Its purpose is to notify
the on-line computer system, via the RS-232, that all ranges and x or y coordinates to that
target are minimum values and generally do not indicate actual ranges. I.e., use this data
cautiously. At small depression angles (less than 20 degrees from the horizontal), measure-
ment of depression and subsequent calculation of horizontal range is highly inaccurate; as a
result, the X and Y hydrophone offsets are ignored for the pinger only, and its bearing is dis-
played relative to the actual hydrophone location (and North if the compass is enabled). Its
actual range cannot be computed. See Figure 3-31 for an example. This warning applies to
the individual target only.
NOTE: The pinger's bearing data does not degrade in this mode.
When a pinger depression angle is < 20° from the horizontal, the pinger's position cannot be
determined. The TrackPoint shows its bearing accurately with respect to the hydrophone and
places the pinger off-screen along with the trailing dotted line. The transponder position re-
mains with respect to the reference point. The error code 51 warns that the pinger's position
can no longer be calculated, so refer to its bearing value as an indication of position.
52
This warning is set when the target is a pinger and the depression angle is less than 20 de-
grees from the horizontal. Its purpose is to notify the on-line computer system, via the RS-
232, that all ranges and x or y coordinates to that target are minimum values and generally
do not indicate actual ranges. I.e., use this data cautiously. The status block and RS-232 data
show the same format as in error code 51. The bearing is referenced to the hydrophone loca-
tion (and North if compass is enabled). This warning applies to the individual target only.
53
This warning is set when the target is a pinger and the depression angle is between 20° and
45°. In this condition, position accuracy is degraded and the ranges in the status block are
preceded by an approximate "
≈ " symbol. This warning applies to the individual target only.