Multiple Indicators - Telephonics RDR-1600 Pilot's Manual

Course Bearing Cursor (Cont.)
11.0 AC 90-80
The FAA allows lower minimums in radar approaches to clusters of rigs,
when both the radar altimeter and "course bearing cursor" are operating
and are used as described in AC 90-80. For details on minimum approach
heights and distances, refer to FAA AC 90-80.
+
Advisory Circular AC 90-80, Approval of Offshore Standard
Approach Procedures. . .can be downloaded from www.faa.gov in
Adobe Acrobat format.
Click on:
• Aviation Support and Regulation, then
• Guidance, Reference, Advisory, then
• Index of FAA Advisory Circulars (AC)
Go to the search engine at the bottom of the AC page and enter
the title in quotations to find the AC.
44 RDR-1600 Pilot's Guide
Note
TM106101(8/01)

12.0 MULTIPLE INDICATORS

An additional MFD unit, is required for multiple indicator installations.
Since all controls for the radar system are located on the control panel, both
MFD observers will see the same display.
• Operating modes
• Search and beacon gain
• Antenna tilt angle
• Antenna scan angle
• Beacon code
All indicators independently control:
• Display range
• Desired brightness level
The RDR-1600 will perform dual scan operation when the range of indica-
tor No. 1 (or 2) is greater than or equal to 20 nm and indicator No. 2 (or 1)
is less than or equal to 10 nm, and the mode of operation is either search
1 or search 2. In this situation, the short range will use a short transmitted
pulse, and the long range will use a long transmitted pulse. This is an
incompatible situation in that the transmitter cannot transmit both a long
and short pulse at the same time. In this situation, indicator No. 1 will be
updated on the right to left sweep of the antenna, and indicator No. 2 will
be updated on the left to right sweep of the antenna.
RDR-1600 Pilot's Guide
TM106101(8/01)
Multiple Indicators
45