CA42/50/52 Glossary of terms Appendix A
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advanced so high as to obliterate all clutter, since this setting could prevent the
detection of close in-target echoes.
Trails – is a feature which allows the operator to see the past history of target
movement as an after-glow or “Wake” behind the moving targets or own ship.
If the range scale is changed, the trails are cleared and new trails histories will be
redrawn to the screen.
The trails are drawn for anything that moves on the screen, including sea gulls,
sea clutter, buoys, lobster pots, and shoreline. In general it is better to use the
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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