The proper method for measuring a boat is not as straightforward as it might seem. It actually involves several different measurements.
Why do I need to measure my boat?
Measuring your boat properly is important because this information is used to determine your boat's registration costs, what accessories to purchase or how much ventilation your boat needs. Boat measurements are also important when determining the dockage, storage and transportation needs of your boat.
Your new boat will come with an owner's manual that includes manufacturer's specifications that indicate your boat's measurements; however, these measurements do not always correspond exactly to measurements you would find if you measured the boat yourself. If you have any issues with registration or with docking your boat, you'll want to take new measurements to be sure they are accurate. You might also need to take measurements if you built your boat yourself or if you bought the boat secondhand and do not have the manufacturer's specifications.
For an accurate measurement, use a measuring tape that does not stretch.
Different boat measurements
There are three main measurements for any given boat. These are the overall length, the overall height and the beam. You might also need to measure the load waterline, which indicates how low your boat sits in the water when it is fully loaded. This measurement can determine if your boat is overloaded or not.
The above measurements are determined as follows: