JRC JMR-7230-S3 - Page 53

5-37 Section 5 Basic Operation of the Radar
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APP A
APP B
1
• When using 1-axis log, heading speed component can be detected, but
transverse speed component cannot be detected. Then leeway effect
(component drifted by wind) cannot be detected.
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When using 2-axes ground log, its accuracy in shallow waters may be
deteriorated, and its speed in deep sea areas may be unable to be detected.
•
When using a GPS, COG accuracy is less than ±3° at speed: from 1kn to
17kn, and is less than ±1° at speed: more than 17kn.