# Top 101 Boating Facts and Factoids

The Official Cheat Sheet From Boating’s College of Nautical Knowledge
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Down a Lazy River

A power-driven vessel operating in a narrow channel on the Great Lakes or in western rivers and proceeding downstream with a following current, has the right-of-way over an upbound vessel.

Twice as Nice

If you have two similar lines and the second is twice as thick as the first, the second line will be four times stronger than the first.

Found Horizons

Distance to your radar's horizon in nautical miles can be estimated with the following formula: 1.23 x the square root of H = Distance H = the height of the radome in feet

Near or Far

To determine the distance to any object, use the following formula:

D + 1.17 x the square root of H = Distance

D = distance to the horizon in nautical miles (see above)

H = eye height above sea level in feet

Use this formula twice. Once to calculate the distance to the geographic horizon, and once to calculate the object's distance off. Add the two to get the total distance off for the object.

Sit-ups

A tall person (6'2" and up) generally requires 3'2" of sitting headroom. A person of average height (5'8") needs 2'11".

Who Needs NOAA?

Often, you can see the approach of a front or squall on radar, usually with the unit set on the 6- or 12-mile range.

Moonstruck

Tide is highest at the full new moon.

'Tis Hurricane Season

June, too soon;

July, stand by;

August, look out!

September, you will remember.

October, all over.