For more than 30 ft. That means the beam of a boat this size should be one-fifth of its length. LOA is the overall length of the boat. All units of measurement are in feet. So, what is a boat beam? What does beam mean on a boat? The beam of a boat is the width of the vessel at its widest point. In nautical lingo, it is called beam overall or BOA. It refers to the overall width of a boat, or even a ship, measured at the widest section of the nominal waterline.
A boat with a wider beam is more stable than a boat with a narrow beam. Read on to learn more about the boat beam, the boat beam definition, and its purpose.
How to Measure the Beam of a Boat? Measure the Centerline Get the measuring tape and measure the width of the stern. Calculate the center of the stern by dividing the width in half. Then mark that halfway point on the deck. Get one end of the twine and tape it to that center mark. To make a more accurate measurement, measure the width of the bow.
Divide this measurement in half. Then mark the center of the bow. This will show you the precise centerline of the deck or boat. Measure the Beam Visually choose the widest part of the boat. Get the measuring tape and pull it across the gunwales. This part is the top edge of the hull of the boat. The hull of the boat is its body. Make sure that the tape is perpendicular to the centerline. The boat beam width is the distance between the outer edges of the hull.
Move the tape a few inches ahead and one more time a few inches to the rear of the first measurement you got from number 3. The point being: the beam on a boat should be the widest point in the boat. Here is an example: Problem: Find the beam of a boat that is feet long.
First, find the cube root of , which is equal to 5. Calculate 5 squared, which is The measurement is the beam width of your Jon boat. Aside from the beam width, there are several other Jon boat measurements that you should take note of. Although we have a full article showing you how to accurately measure your Jon boat we will quickly cover the basics again here.
All you need is a measuring tape and a couple of minutes to spare. It is also best to have your boat out of the water to get accurate numbers. Measuring the length overall, otherwise known as the LOA, is pretty straightforward. Word of the wise — do not measure until any extensions you might have upgraded your boat with. The LOA only includes the center of the stern. The waterline length measures the surface of the boat that touches the water.
In order to measure the waterline length of your Jon, take note of the part of the bow that touches the waterline. Extend your measuring tape from that point to the area in the stern where the waterline ceases to touch your boat. It should also change based on whether or not your boat is loaded. If you are trying to measure every part of your boat, it is best to start with the waterline length before delving into the freeboard length.
Jon boats have a naturally very shallow draft due to their flat bottom hull design unlike v-hull boats that have a deep draft. This makes Jon boats one of the best shallow water vessels for private use especially in rivers and creeks.
For a more in-depth explanation of the differences between shallow draft and deep draft read this article. Word of the wise, take the total height measurement last. The total height measurement is simply the combination of the draft and the freeboard length. Measuring your boat seems like an tedious activity. However it is actually an essential part of being a boat owner. Seasoned boat owners agree that having the measurements of your boat is not only an essential safety step to take but also makes maintenance and upgrades easier to take on.
In general, a Jon boat is easy to transport but you need to know both the length and the beam of the boat. If your boat has an extended swim platform or swim step that is below the rub rail, do NOT include that in your measurement.
However, we do offer a separate swim platform cover. All CoverQuest. Measure the beam width of your boat. This measurement should be taken at the widest point of the boat, usually towards the transom. Measure from outside edge to outside edge in a straight line.
This measurement is your beam width. For additional information on measuring, material and fit options, be sure to check out our Boat Cover Guide. We also have Boat Cover Experts ready to answer your questions!
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