BendixKing IN-182A System RDR-2000 - Manual (Page 47)

OPERATION
Whether you are a highly experienced weather avoidance radar operator
or are using radar for the first time, you will find operating the Vertical
Profile feature easy. In fact, most will find that Vertical Profile simplifies
normal operation.
The best time to begin using Vertical Profile is on a nice sunny day when
the pilot work load will allow time to experiment with the new feature.
Start out by adjusting the tilt angle to a normal setting.
TRK - Press and hold either the TRK (track) left or TRK (track) right
button. A yellow line will appear on the screen and start to slew in the
direction selected. In the upper left corner of the display a yellow numeric
annunciation will display the number of degrees left or right of the aircraft
nose the track line is positioned. To stop the track line at a desired posi-
tion, release the track button. If a TRK button is not pressed for 15 sec-
onds, the track line will disappear from the display.
VP - Once the desired azimuth is selected with the TRK button, press the
VP button to enter the Vertical Profile mode of operation. When VP is
selected the Vertical Profile screen will appear on the indicator and the
radar will provide a vertical scan of ±30 degrees at the location of the hori-
zontal track line.
Selecting the Vertical Profile mode of operation will not change the
selected mode of operation displayed in the lower left corner of the display
(TST, Wx, WxA or GND MAP). Once in Vertical Profile, these modes may
be changed as desired. Vertical Profile will engage from the NAV MAP
mode, but NAV data will be disabled during Vertical Profile operation.
Note: VERTICAL PROFILE OPERATIONAL ADVISORY: The
RDR 2000 is a weather analysis and avoidance tool. It should never be
used for pre-planned penetration of storms. However, in the event of
required navigation in areas of bad weather, the proper use of this tool
can reduce the likelihood of encountering excessive precipitation and tur-
bulence. The RDR 2000 radar greatly simplifies the task of determining
vertical characteristics of a storm by pictorially displaying a vertical slice
of the cell and showing it’s radar height. The accuracy of radar height is
limited by beam illumination and range resolution. Since cloud tops com-
posed of ice crystals or dry hail, both of which have low radar reflectivity,
or storm associated turbulence without precipitation may extend several
thousand feet or higher, appropriate caution must be exercised when
attempting to over fly any cell which exhibits high radar reflectivity or
extends above the freezing level. Vertical Profile is not intended to mea-
sure the absolute height of a storm although it can be useful in deter-
mining relative radar heights of different cells. Flying near or under a
thunderstorm should never be attempted, even if radar returns are weak
at low levels, due to the possibility of extreme turbulence and windshear.
Effective Date: 5/98 RDR 2000 Pilot's Guide: Rev 3
43
VP Operation In-Flight