Specifications

BATS AND PORTABLE BATS OPERATION
3-106
NOTE: Smoothing occurs on the target position only (X, Y or Horizontal Distance, Brg), NOT
the slant range. For non-pinger targets the slant range is displayed in the status
block and sent out the RS-232 as the actual value. For pinger targets the slant range
is calculated and smoothed.
The Z (depth) can be either a manually entered value, a telemetered value, an analog input value
or a calculated value. Z is in meters, feet or yards if Format STANDARD or STANDARD-EC STD
W/PR, STD-EC W/PR, NCSC or NMEA ORE, NUWC or NUWC-EC is selected, or just meters if Format
REV 4 or REV 4-EC is selected. If NMEA TTM is selected then Z range is in kilometers.
NOTE: Filter settings 6-10 cause the analog or telemetry depth (Z) to average the last three
readings. Filter settings 1-5 do not average the input depth.
The TELEMETRY (TELEM) data is independent of the position data. Its value is dependent upon
the parameters set under each target's menu. It is an instantaneous value. If telemetered DEPTH is
selected for that target instead of telemetered DATA, the TELEM number is the instantaneous depth
value, while Z is the averaged depth value used for positioning calculations.
The ERROR CODE (ERR) or WARNING CODE (WARN) is a one- or two- digit error code indicating
that the data received could not be used for a valid position fix, or it can represent a warning to let
an operator know that the position accuracy could be compromised (see ERROR and WARNING
CODES, section 3.15).
PITCH and ROLL is either from the PITCH and ROLL from the hydrophone VRU (Models 4610B Hy-
drophone or 4740A VRU/Amplifier) or a remote VRU (Dynamic motion monitoring sensor, such as
the EdgeTech Model 4414A). The units are in degrees. When the SYSTEM / OFFSETS / HYDRO-
PHONE / VRU / STATUS function is set to ACTIVE a positive PITCH is output the RS232 when the
BOW of the vessel is UP and a positive ROLL is when the vessel rolls to starboard or PORT side UP.
If the internal VRU STATUS function is set to STATIC, configured for remote VRU sensing, the
NMEA ORE format changes to follow the incoming voltage polarity instead of the BOW UP/PORT UP
protocol.
The QUALITY FACTOR is a value (1-10) determined by the system on each reply that is detected.
The system uses the phase or time counts from each of the hydrophone elements to determine the
quality of the signal. If the phase counts are consistent on all three channels through-out the reply
burst the quality factor is very high. If the phase counts have jitter or are inconsistent then the
quality factor is low.