559
5.4.7 Hysteresis
Set a hysteresis level at which a tracked target and an AIS target are identified as one target by the association
assessment function.
Set the condition for using an association symbol when a tracked target symbol and an AIS target symbol
overlap each other.
Procedure
1 Press the [TT menu] key.
2
Press the following buttons.
3 Target setting
1 Association assessment setting
7 Hysteresis
Set a level of hysteresis at which targets are identified as one target between 0% and 300%.
The standard percentage is 100%.
In the case of 100%, The level of hysteresis is equal to n/m.
n: The time of judgment which targets are identified as one target
m: The time of judgment
Therefore 50% means that the level of hysteresis is equal to n/(2*m).
200% means that the level of hysteresis is equal to (2*n)/m.
A larger value means a stricter condition.
The possibility of mistakenly identify resembling targets will be lower, but targets are less
likely to be identified as one target.
A smaller value means a looser condition.
Targets are likely to be identified as one target, but targets with similar parameters are
likely to be mistakenly identified.
Adjust the setting in accordance with the intention.
When a small value is set as a hysteresis
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.
Caution
Summary of Contents for JMA-5212-4
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Page 18: ... xii NKE 2103 6 6HS Scanner Unit NKE 2254 7 9 6HS Scanner Unit Warning Label Warning Label ...
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Page 45: ...1 4 EXTERIOR DRAWINGS 1 6 1 y Fig 1 1 Exterior Drawing of Scanner Unit Type NKE 2103 4 ...
Page 46: ...1 7 Fig 1 2 Exterior Drawing of Scanner Unit Type NKE 2103 6 ...
Page 47: ...1 4 EXTERIOR DRAWINGS 1 8 1 y Fig 1 3 Exterior Drawing of Scanner Unit Type NKE 2254 7 ...
Page 48: ...1 9 Fig 1 4 Exterior Drawing of Scanner Unit Type NKE 2254 9 ...
Page 49: ...1 4 EXTERIOR DRAWINGS 1 10 1 y Fig 1 5 Exterior Drawing of Monitor Unit Type NWZ 164 ...
Page 50: ...1 11 Fig 1 6 Exterior Drawing of Processor Unit Type NDC 1460 ...
Page 51: ...1 4 EXTERIOR DRAWINGS 1 12 1 y Fig 1 7 Exterior Drawing of Keyboard Unit Type NCE 7699A ...
Page 52: ...1 13 Fig 1 8 Exterior Drawing of NSK Unit Type NCT 4106A ...
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Page 58: ...2 1 2 1 EXAMPLE OF DISPLAY ...
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Page 358: ...7 25 Exit 1 Press RADAR MENU key The Main Menu will reappear ...
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Page 477: ...Figure 8 NKE 2254 Interconnection Diagram of Scanner Unit ...
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