Specifications

BATS AND PORTABLE BATS OPERATION

3-21

 Acoustic Parameters Tab

Type: Selects target type, ei-

ther Transponder (acoustic),

Transponder (Hardwired), Re-

sponder or Pinger. If the Tran-

sponder or Responder has Time-

Decode Telemetry then click on

the Telemetry box. If a Pinger

is not received an error code #6

is displayed after 12 seconds.

NOTE: When a target is desig-

nated as a Pinger it is the only

target that can be enabled at

one time. Disable any other tar-

gets.

A Transponder is an underwater

beacon that is interrogated

(Triggered) acoustically. It usually requires a single frequency or tone at a minimum pulse length

before it will respond with its reply frequency. A Turn-Around-Time must be selected in order for

the system to calculate an accurate slant range. A Responder is triggered electrically. For example,

if tracking an ROV or Towfish, utilize the umbilical cable for sending down a key pulse to fire the

unit. This provides a more stable track as you do not have the jitter in range due to the receiver as

in the Transponder. A Pinger requires that the operator know the repetition interval of the beacon.

Select the interval from the pull down list under reply parameters

When tracking a Pinger the system requires an interrogation interval be entered at the same rate

as the repetition interval. The system automatically sets the interrogation interval from the entered

repetition interval.