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© Teledyne Limited
DPN 402197 Issue 7.1
Glossary
Item
Definition as used throughout this Manual
ALT
Coil altitude above the seabed. This could be measured by a subsea altimeter con-
nected either directly to the SEP or through the umbilical to the topside computer.
Where there is no altimeter fitted to the system, ALT could contain a fixed coil height
that you specify during the configuration procedure.
COV
Target depth of cover. DeepView 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 350 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
Subsea power supply pod. The depth rated unit that accepts an electrical supply from
the ROV and produces the conditioned and stabilised d.c. supplies used by the SEP.
ROV
Remotely operated vehicle. Any form of sub-sea or surface vehicle supporting the 350
system during survey operations.
SDC
Surface display computer. One of the configuration, control and display computer
options used to operate the 350 system.
SEP
Subsea electronics pod. The depth rated unit that performs the measurement operation
on the target.
VRT
Vertical range to target. The distance measured by the 350 system along a line perpen-
dicular to the coil surface, between the coil array and the closest point of the conductive
target.
