Floating Fly Lines
Floating fly lines are by far the most popular and commonly used lines. Floating lines should be the first choice for the beginner and we would suggest not progressing to Intermediate or sinking lines until you have a good casting technique . As the name suggests these lines float making them easier to lift from the water, another advantage is that takes can often be seen well before they would be felt with a sinking line. Floaters can be used for fishing dry flies on the surface, and also other flies such as nymphs, Lures and wet flies below the surface. Intermediate Fly Lines
Intermediate fly lines are really a slow sinking line and are designed to fish in the top layers of the water column. If left long enough an intermediate fly line will eventually sink to the bottom and typically have a sink rate of between 0.5 and 1.5 ips (inches per second). These lines are Ideal for avoiding surface wake on calm days which can easily spook fish or when fishing in shallow water. Another benefit is to prevent surface drag on the line on rougher windy days. Sinking Fly Lines
Sinking fly lines come in different sinking densities from slow sinking which typically sink at around 2 inches per second right through to ultra fast sinking lines which sinks at up to 8 inches per second. A sinking fly line will help get your fly down to the depth where the fish are feeding. Most modern sinkers indicate the actual sinking rate within the product code so for example WF 7 S5 means that it is a Weight forward line, AFTMA 7 with a sink rate of 5 or around 5 inches per second.