Pitometer log

Imagine you're in a boat and you want to know how fast you're going. You can look at the water moving past you, but that won't give you an accurate reading because the water could be moving fast or slow depending on the currents. What you need is something called a pitometer log.

A pitometer log is a special device that measures the speed of a boat by measuring the water as it flows past the boat. It has two hoses that are placed on the outside of the boat. One hose is pointed straight into the flow of the water and the other hose is pointed in the opposite direction.

When the boat is moving through the water, the pitometer log measures how much faster the water is moving in the first hose compared to the second hose. This difference in speed tells us how fast the boat is moving.

The pitometer log has a little wheel that spins as the water moves past it. This wheel is connected to a counter that tells us how many revolutions it made in a certain amount of time. We can use this information to calculate the speed of the boat.

So, in simpler terms, a pitometer log is a device that helps us figure out how fast a boat is moving by measuring the water as it flows past the boat. It does this by using two hoses and a spinning wheel to calculate the speed of the boat.