Teledyne 440, System Manual, Page: 17 / 256

Glossary
DPN 402196 Issue 4.1 © Teledyne TSS xv
Glossary
Item Definition as used throughout this Manual
ALT Coil altitude above the seabed. This could be measured by a sub-sea altimeter con-
nected either directly to the SEP or through the umbilical to the SDC. Where there is no
altimeter fitted to the System, ALT could contain a fixed coil height that you specify dur-
ing the configuration procedure.
COV Target depth of cover. The SDC calculates this distance by using COV = VRT – ALT.
CV Composite Video. This can be utilised in either NTSC or PAL formats.
LAT Lateral offset. The horizontal distance measured by the 440 System between the top of
the target and the centre line of the coil array. Positive measurements indicate a target
to starboard of the centre line.
PSU Sub-sea power supply pod. The depth rated unit that accepts an electrical supply from
the ROV and produces the conditioned and stabilised DC supplies used by the SEP.
ROV Remotely operated vehicle. Any form of sub-sea or surface vehicle supporting the 440
System during survey operations.
SDC Surface display computer. The configuration, control and display computer supplied by
Teledyne TSS to operate the 440 System.
SEP Sub-sea electronics pod. The depth rated unit that performs the measurement operation
on the target.
VRT Vertical range to target. The distance measured by the 440 System along a line perpen-
dicular to the coil surface, between the coil array and the closest point of the conductive
target.