Raymarine RayTech RNS 5.0, User Manual

Page: 56 / 152

48 RayTech RNS V5.0 - User’s Manual
7.5 How do I get the best radar picture?
You can get a clearer radar picture by minimizing the effects of false or multiple echoes
and clarifying target presentation by using the softkeys/controls accessed using the
radar softkeys:
How do I use the gain functions?
The effects of false echoes and clutter can be reduced by using
the GAIN softkey and its associated controls to make the overall
picture clearer. The AUTO settings usually give the best results
although you can adjust these settings if required.
If you use manual settings they are retained when the radar is set
to standby or if you exit RNS.
To use the gain functions:
1. Click on the softkey for the required function.
2. Click on the softkey for control options.
3. Adjust the settings as necessary.
4. When you have finished, click the
BACK
button.
FTC
You can use the Fast Time Constant (FTC) function to remove areas of clutter at a
distance from your boat. It should be used in conjunction with the RAIN function to
obtain the best results.
When the FTC function is turned up, only the leading edge of large (rain clutter) echoes
is shown, while the effect on smaller (boat) echoes is slight. This means that you can
also use the function on shorter ranges to distinguish between two very close echoes
on the same bearing, which may otherwise merge and appear as one echo.
D6945_1
D7017_1
D6947_1