JRC JMA-9133-SA Instruction Manual page 336

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JMA-9100 Instruction Manual 6.TRUE AND FALSE ECHOES ON DISPLAY
Height of RADAR Scanner
When the height of own ship's scanner is 10 m for instance,
i.
A target that can be detected at the radar range of 64 nm on the radar display
is required to have a height of 660 m or more.
ii.
If the height of a target is 10 m, the radar range has to be approx. 15 nm.
However, the maximum radar range at which a target can be detected on the
radar display depends upon the size of the target and the weather conditions,
that is, the radar range may increase or decrease depending upon those
conditions.
D[NM]
Detective Range
Fig 6-2:
Maximum detection range of a target
6－ 2
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6.1 RADAR WAVE WITH THE HORIZON
Height of Target