Specifications

BATS AND PORTABLE BATS OPERATION

3-74

EXPLANATION OF ERROR CODES

CODE

DESCRIPTION

con Setup dialog/ Depth Tab, Telemetry/Reply Frequency Setup) VS Beacon label to make

sure the Telemetry code is correct. If no Navigation Reply received then refer to the “No Nav

Signal Detected” (06) first.

This warning occurs in transponder or responder mode when the target input depth is not

within 10% of the calculated depth, when in calculated depth mode, or within 2% of the cal-

culated depth when in the input depth mode. The warning is triggered when the target de-

pression angle is greater than 40° (from the horizontal). The system calculates the depth at

that point and compares it to the input depth (manual, analog or telemetered); if in error the

warning 50 appears to alert the operator that the input depth may be in error and that a large

excursion of the target position may occur.

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.

51 (cont.)

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.