Search Operations (Cont.)
Search Operations (Cont.)
34
RDR-1600 Pilot’s Guide
TM106101(8/01)
TM106101(8/01)
RDR-1600 Pilot’s Guide
35
7.4 SEARCH MODES COMPARED
In the photographs below, the aircraft is flying southwest along the Florida
Keys. Florida’s marshy coast is on the right and the islands are in the cen-
ter of the screen. Strong boat target returns are on the left. Tilt and search
gain are adjusted for optimum display. Note that in SRCH 3, the land
masses blend together while in SRCH 2 and SRCH 1, a small boat (arrow)
target can be extracted from heavy seas.
7.4.1 Search 3
Conventional ground map mode. Beyond 10 mile range, SR1 and SR2 are
the same as SR3.
The radar’s long range mapping compatibility may be used to recognize
known, well defined targets such as mountains, lakes, rivers, or cities. Use
of gain and tilt controls will often improve picture quality.
Figure 7.4.1-1. Search 3
7.3 DIFFERENCE BETWEEN WEATHER AND SEARCH MODES
In weather modes, the receiver gain is preset and cannot be changed by
the pilot. In the search modes, the pilot controls receiver gain with the
SRCH knob on the indicator front panel for best display resolution.
Additionally, in search modes on ranges below 10 miles, the transmitter
pulse is changed to enhance target resolution.
When operating in weather or search modes, both weather and ground
returns can appear on the screen at the same time.
Figure 7.3-1. Wx and SRCH Buttons
