ATLAS North America Proprietary
Sea Scan® ARC Explorer™ Manual
1 of 1
Page: 60
Issue: 4.2.1
2SFT1-0001
Manual
port
The left side of an object or ship
projector
An device that transforms electrical signals into sound
waves
pulse length
The length of time that a sonar unit is transmitting one
pulse
pulse width
The horizontal width of the sonar signal from the
transmitter
RAM
Random Access Memory
range
The maximum distance from the transducers that the sonar
signal can detect usable signals
range delay
The distance (or range) the Sea Scan software is told to
delay after pinging before it starts to look at acoustic
returns
range marker
A scale reference line shown in the sonar window
reflectivity
The strength of the sonar return off an object or material
RGB
Red/Green/Blue
ROV
Remotely Operated Vehicle
sea clutter
The distortion of a reflected sonar beam that impacts the
water’s surface
scattering
The diffusion of a sonar beam in many directions because
of sea conditions; as a result, the amount of energy
available to reflect off an object reduces as the outgoing
acoustic wave travels away from the source
shadow
The area that the sound wave cannot reach behind an
object because of the object’s protrusion above the sea
floor; used to determine the height of the submerged object
side-scan sonar
An acoustic imaging device used to provide wide-area,
large-scale images of the bottom of a body of water
signal statistic
Statistical information on a ping, typically an average,
minimum, or maximum level
slant range
The straight-line distance from the towfish to an object at
any given location
SOG
Speed Over Ground
sonar
SOund Navigation And Ranging
starboard
The side of an object or ship
swath
The total side-to-side coverage of the sonar signal on each
sweep of the seabed; also called a line
