The Original “Rule of Thumb”

The original “Rule of Thumb” is thought to be the principle adopted by shipmasters to avoid dangers. They would never allow their vessel to approach a danger nearer than the distance that corresponded to a thumb’s width on the chart. On a large-scale chart with plenty of detail they could navigate closer to potential dangers than on a small-scale chart with less detail.

We are creating this Blog to share some boating tips and techniques that should help to make your boating safer and more enjoyable. We hope you enjoy it!

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