Appendix A Glossary Of Terms - Simrad EQ33-2 Instruction Manual

EQ33-2 Glossary of terms
Alarms – can be set to sound a "beep" if the echosounder detects a target
above (shallower than) a minimum alarm depth or below (deeper than) a
maximum alarm depth. The EQ33-2 allows you to set the alarm depths and to
enable or disable both the minimum and maximum depth alarms.
A-scope – a method of displaying the echosounder information. In A-Scope
mode, the echoes are displayed in a "bar-graph" format, with stronger echoes
displayed not only in the color representing their target strength, but also in a
width representing their target strength.
Configuration – the configuration functions of the EQ33-2 allow you to adapt
the system more specifically to your needs. You may set Units of measure
(feet, fathoms, meters, etc.), Menu languages, Scroll speed, etc.
Depths – DK = Depth below keel, DS = Depth below surface, DT = Depth
below transducer.
Echogram background color – is the color shown on the EQ33-2 in the event
no target is present. There are three colors to choose from, white, blue or
black, where black is especially useful during nighttime operation when the
white background could appear too bright.
Echosounder frequency – 50 kHz or 200 kHz can be selected to suit the
task. 200 kHz is for general purpose and offers optimum discrimination and a
narrow transmitter beam. 50 kHz is for searching in a wider area, determining
bottom conditions and going the deepest.
Event marker – allows the user to set a vertical marker on the screen at the
current ping to indicate a school of fish, etc.
Measurement units – the user may select the displayed units to be one of the
following:
m meters
ft feet, 1 foot is 0.3048 meter
fm fathoms, 1 fathom is 1.83 meters
nm nautical mile, 1 nm is 1852 meters
kn knots, nautical mile per hour
km kilometer, 1 km is 1000 meters
kh kilometer per hour
mi statute mile, 1 mile is 1609 meters
mh mile per hour
Pb passi braccio (Italian unit), 1 Pb is 1.65 meters
Appendix A-1