ATLAS North America Proprietary
Sea Scan® ARC Explorer™ Manual
1 of 1
Page: 61
Issue: 4.2.1
2SFT1-0001
Manual
TCU
Topside Communications Unit
topside processor
The control unit an operator uses on the towing vessel to
collect and observe the incoming data from the transducers
towfish
The device that is towed through the water on which the
transducers are mounted
transducer
The projector and hydrophone that make up an active sonar
system
true range (ground
range)
The horizontal distance from the towfish to the object or
bottom location
TVG
Time-Varied Gain; a process where amplifier gain is
changed based on time and matched with returning signals
between outgoing pulses of the side-scan sonar
.sds
sonar Data Stream, the extension that the software attaches
to the names of data files
USB
Universal Serial Bus
UTM
Universal Transverse Mercator, a coordinate mapping
system that maps to a grid rather than to latitude/longitude
Universal Length Unit
A standard for measurement of areas in user-specified units
water column
The track along the bottom immediately beneath the
towfish; this track provides supplementary information to
the operator, such as the altitude of the towfish relative to
the water’s depth or the presence of sea clutter
waterfall
A term used to describe a display that puts the newest data
at the top and scrolls the data down like a waterfall
wavelength
The distance between acoustic waves
waypoint
A position of interest made and displayed on the navigation
Plotter
WVS
World Vector Shoreline
.xvy
The extension that the software attaches to the names of
survey files
XTE
Cross-Track Error
