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Determining actual radar range – Raymarine Marine GPS System User Manual

Page 99

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RayTech Navigator User’s Guide

5-8

Determining Actual Radar Range

The actual maximum radar range is essentially line-of-sight, and is
limited by the height of the scanner and the height of the target as
shown below lists some range examples:

Radar Range

Antenna Height (m)

Target Height (m)

Maximum Range (nm)

3

3

7.8

3

10

10.9

5

3

8.9

5

10

12.0

Note:

The ranges shown in the table are theoretical maximum
ranges. The radar horizon is greater than the optical
horizon, but the radar can only detect targets if a large
enough target is above the radar horizon.