CR40/42/50 MKII Glossary of terms Appendix A
159
trails feature away from harbors and the shoreline to avoid a cluttered display to
better concentrate on trails of target vessels, etc.
True motion – land, buoys and fixed objects remain stationary while targets and
own ship track across screen. In the North-Up mode, you must be interfaced with
an electronic compass for proper operation.
TUNE control – is a variable control used to tune the receiver in the pedestal/
radome for maximum target returns on the display. If no land or ship targets are
available, the operator may tune for maximum sea clutter. The tuning indicator
will show the strength of tuning peak conditions and is tuned for maximum
deflection. Normally, tuning of the radar is performed on the 3nm range scale or
higher.
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