Given the numbers (often listed as "Particulars") that accompany almost every boat plan, here are some design ratios that might help predict a boat's performance. Even if you disliked high-school algebra, these equations will prove simple enough to solve with an inexpensive scientific calculator (available at most supermarkets and drugstores for less than $10). In any case, don't let this arithmetic spoil your day. You can skip the following section and return to it when you feel more mathematically inclined.
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