You can ride in a big boat on a river. 

You can ride a big boat on a river. 

Rafting is a fun way to travel on water. 
There are different ways to move a raft. You can use paddles. A paddle has a single blade and a handle. People use paddles in smaller rivers. You can also use oars. Oars are longer tools used to row. They attach to a metal frame on the boat. This is called rowing. 
Rivers have different levels of difficulty. We call this the International Scale of River Difficulty. Class 1 water is very easy. Class 6 water is very dangerous. Most people stay safe by using gear. You should always wear a helmet and a lifejacket. 
Rafting is an exciting way to travel across rivers and other bodies of water. 
There are two main ways to move a raft through the water. You can use paddles to move through smaller or lower volume rivers. A paddle has three parts: a single blade, a shaft, and a T-grip. Many people use paddles because they are an engaging way to enjoy a trip. You can also use oars to move through wider and flatter rivers. Using oars is called rowing, not oaring. Oars attach to a metal frame called an oar frame. These oars connect to the frame using either oarlocks or a pin and clip system. 
History shows that people have tried to navigate rivers for a long time. In 1811, there was a plan to go down the Snake River in Wyoming. That trip was very dangerous, so people called it the "Mad River." Later, in 1843, Lieutenant John Fremont brought the first rubber raft to the United States. In 1844, Peter Halkett made more improvements to these vessels. By the 1950s, rafting had become a popular adventure sport. In 1940, Clyde Smith led a successful trip through the Snake River Canyon. 
River experts use a special scale to rank how hard a river is. This is called the International Scale of River Difficulty. Class 1 water is very easy and only has small rough areas. Class 3 water has small waves and requires some experience. Class 5 water has large waves and requires full mastery of skills. Class 6 water is considered extremely dangerous and is often unnavigable. 
Safety is the most important part of any rafting trip. 
Rafting is a recreational outdoor activity used to navigate rivers or other bodies of water. 
Moving a raft requires specific tools for propulsion and steering.
Oars are attached to the boat using a large metallic structure called an oar frame. 
Modern rafting equipment has changed significantly since the era of World War II military surplus rafts. 
History shows that navigating rivers has always been a challenge. 
To manage safety, experts use the International Scale of River Difficulty. 
Safety is a major focus for both commercial and private rafters. 
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