JRC JMA-5208, Инструкция по эксплуатации

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Use the target tracking function (TT) only as a navigation
aid. The final navigation decision must always be made
by the operator him/herself. Making the final navigation
decision based only on the target tracking function (TT)
information may cause accidents.
The target tracking function (TT) information such as
vector, target numerical data, and alarms may contain
some errors. Also, targets that are not detected by the
radar cannot be acquired or tracked.
Making the final navigation decision based only on the
radar display may cause accidents such as collisions or
running aground.
CAUTION
When a large value is set as an association condition, a
tracked target near an AIS target is identified as the AIS
target and may thus disappear from the display.
For example, when a pilot vessel equipped with the AIS
function (a small target which is not a tracked target)
goes near a cargo vessel which is a tracked target
without the AIS function, the tracked target symbol for the
cargo vessel may disappear.
Target Tracking Function Test is provided to test if the
target tracking function is operating normally. Thus, do
not use the function except when you test the target
tracking function.
Note especially that, if this function is used during actual
navigation, simulated targets are displayed and may
become confused with other actual targets. Therefore,
never use this function during actual navigation.