Wufoo highlights errors, explains exactly what the user did wrong and preserves the data across refreshes, which makes corrections easy.

Wufoo高亮显示错误，并把用户做错了什么解释清楚，网页刷新时还会保留数据，这些让修改变得很容易。

youdao

Again, since a-waves in a corrective decline can be either 3 waves or 5 waves, it makes it more complicated to analyze corrections at the start of the correction.

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Now added to this is a GLA station in Dover that broadcasts corrections to eLoran that makes signals so precise ships can enter harbours using them in the event of GPS failure.

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This makes it easier to make course corrections.

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