With a zone defense strategy, the defenders cover an area rather than
a specific person. The area they cover moves with the disc as it
progresses down the field. Zone defense is frequently used when the
weather is windy, rainy, or snowy. The zone defense is also used to
discourage the offense from making long passes. A zone defense usually
has two components. The first is a group of players close to the disc
who attempt to contain the offenses' ability to pass and prevent forward
movement. The "zone" is sometimes called the "wedge", "cup", "wall", or
"clam" (depending on the specific play or type of zone defense). These
close defenders always position themselves relative to the disc, meaning
that they have to move quickly as it passes from handler to handler.