What type of line is primarily used because it floats?

Polypropylene line is primarily used because it floats, making it particularly useful in various marine applications where a floating line is advantageous. For instance, floating lines are beneficial for certain types of fishing, as they can keep bait or lures at the water's surface. Additionally, they are useful for mooring or tying off to buoys where it is essential that the line does not sink, which could create entanglement hazards.

Polypropylene is a synthetic material that is lighter than water, allowing it to maintain buoyancy. Its characteristics make it ideal for situations in boating and fishing. Other types of lines, such as nylon, while strong and elastic, do not inherently float; they typically sink. Manila line is natural fiber and also tends to sink, plus it is more affected by moisture and can degrade over time. Wire rope lacks buoyancy entirely, making it unsuitable for situations requiring a floating line. Therefore, polypropylene stands out specifically for its buoyant quality.