position to still be safely under the line rating while providing flexibility during the fight. Depending on the conditions, some anglers may leave their reels in freespool then setting the anti-reverse or engaging the drag on hookup. Braking mechanisms When casting, the terminal tackles flying through the air will decelerate due to air resistance, causing the line release out of the reel (which is mainly driven by the forward momentum of the terminal tackles) to slow down exponentially. This is particularly apparent when casting lightweight and/or poorly aerodynamic baits/lures, or when casting against the wind. If the angler is using a multipler reel, its rotary spool often still has sufficient rotational momentum itself to keep spinning with a far more gradual deceleration. This deceleration mismatch between the line release and the spool rotation causes the lagging line to inertially "float" off the spool in loose loops before it can exit the reel. Some of these floating loops eventually get pulled into the narrow spaces between the spool and the reel chassis — a phenomenon known as a spool overrun or a backlash. Backlashing often snares the line loops into a very messy tangle colloquially called a "bird's nest" or "birdie", which is notoriously difficult to untangle. Such backlashing is unique to multiplier reels, particularly baitcasters, and is not present with fixed-spool reels such as a spinning reel. To deal with this, most modern baitcasting reels have a so-called "cast control" that serves to reduce the incidence of spool overrun at the cost of sacrificing casting distances. Each time a different lure weight is attached, the cast control must be adjusted to calibrate for the difference in lure momentum and deceleration. The users are also required to learn the skill of "feathering the spool" with their thumb to apply direct tactile friction on the spool surface to slow down or even stop it from spinning. Spool tension Spool tension is an adjustable screw knob that is coaxial to the reel spool. When tightened, the knob exerts axial pressure on the spool gear and generates a consistent frictional resistance when the spool is free-spinning. Centrifugal braking Centrifugal braking uses a series of spring-loaded "blocks" on the spool, which can move radially outwards under centrifugal force when the spool is spinning rapidly. These blocks each have a rubber piece that can rub against the reel chassis, creating additional friction that slows down the