An Alberg 30 is a type of boat that people use for sailing in the water. It was designed by a man named Carl Alberg, who wanted to create a boat that could sail well in lots of different types of weather conditions. The boat is about 30 feet long (that's like 10 big steps!) and it has a special shape to its hull (the bottom part of the boat that sits in the water) that helps it move smoothly through the waves.
Inside the Alberg 30, there's a place for the captain (the person who is driving the boat), as well as other people who might be going for a ride. There can be a small kitchen area, called a galley, where people can cook food or make drinks. There are also places to sleep on the boat, called berths, which are like little beds.
People who like sailing might choose to use an Alberg 30 because it is a good boat for both racing (trying to go really fast against other boats) and cruising (just enjoying a relaxed day out on the water). But it's important to remember that sailing can be dangerous if you don't know what you're doing, so it's always best to have an experienced captain or sailor with you if you're using a boat like the Alberg 30.