Specifications

BATS AND PORTABLE BATS OPERATION
3-75
EXPLANATION OF ERROR CODES
CODE
DESCRIPTION
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.
55
Reserved.
56
When tracking a transponder or responder in calculated depth mode and the target's depres-
sion angle is < 45° from the horizontal, this error code warns that the system is no longer
calculating depth in determining target position. The system is using the input depth (manual,
analog or telemetered) and the measured slant range to determine target position. (Also see
warning code 50.) Refer to section 3.4.3 for explanation of depth MODE.
57
This warning occurs when the input depth of the target is greater than the measured slant
range. This can occur when the target depression angle is between 0 and 45° in calculated
depth mode or between 0 and 70° when in input depth mode.
When an Error Code 57 occurs, a -.- is sent out the RS-232 as shown above to indicate invalid
data within the x and y data fields.
58
Reserved.
59
Reserved in revision 8.05.
60
This warning occurs if in INPUT mode and either ANALOG or TELEMETRY depth is selected. If
the system calculates a depression angle using the slant range and the input depth to be less
than 45° but the measured depression angle given the phase counts from the hydrophone is
> 70° (sound appears to be coming from below the hydrophone due to high multi-path envi-
ronment, e.g., directional beacon pointing up in shallow water) then the system ignores the
phase count depression angle and uses the slant range and input depth to calculate horizontal
range.
61
Horizontal range greater than slant range. (Using Slant Range)
62
Reserved.
64
Low Quality Factor. The signal of the present reply had a quality factor that was lower than
the average of the previous five replies.