Talk:Constant bearing, decreasing range

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How to look up sources?

As a retired mariner, I am well familiar with the term and its meaning. However, I don't have a clue how to go about looking up "verifiable" sources to corroborate this. I create this Wikipedia article in hopes others more skilled at research than I can assist in providing documentation. Bill Cupp (talk) 14:55, 24 June 2011 (UTC)[reply]