This zone sets up with a 3-player cup, 3 mid-field defenders and one "deep-deep" defender. The cup is comprised of 3 positions: the mark (1), the Apex (2), and the off-mark (3). The mid-field is comprised of the two wings (5 & 6) and a central mid (4).
The off-mark is responisble for commnunicating with the mark, giving them queues such as "No Dump", "No Break", "Strike", etc...
The Central Mid defender is in charge of guiding and motivating the cup as a unit. Since they are essencially an extension of the cup, they must be aware of where the cup is weakening, and must move with them in stride. Calls such as "Cutter left" and "Cutter Right" help deter cuts into the cup, and other calls such as "No line" or "close in" help the other plays know where the openings may occur.
Lastly, the "deep-deep" position is the all seeing defender, whos job it is to communicate to the midfield defenders. As positioned, the midfield is a literal extension of the deep-deep, acting as his or her extended arms in filling the sideline spaces. They must tell them when to move towards the disc, when to move away, and when to help with potential deep cuts. Additionally, the deep-deep is responsible for calling the necessary transition from zone defense to man defense if the zone is broken or constricted by the endzone.
A cut into the cup moves as such. When this happens, the Central-mid communicates "Cutter left" (meaning the left side of the apex) to the Apex position, who follows the cutter into the cup.
If the disc is passed to the open-side handler, the entire cup moves to cover the area and trap the disc on the sideline. Notice the mark is guarding against the easy dump throw, the Apex is defending against the break throw, and the Off-mark is guarding the up line option. The wing defender of that side (#6) moves in to defend the quick upline, and will eventually clear back to their position. The far side wing (#5) moves towards the backfield, guarding against any cross field throws.
If the disc is passed to the break side, the cup moves to defend the upline passes. The mark positions themsleves almost streight-up, then Apex guards upfield, and the off mark attemps to defend the open backfield pass. Again, the near-side wing defend the immediate close options, and the far side wing moves to defend the cross field passes.
This is designed to force the disc backwards, stoping the porgress of the offense. If the disc is moved into the backfield, then the off mark stops the immediate swing pass, while the remainder of the zone resets up the defense, holding the same force.
Because (supposedly) the weather is less than optimal for longs throws, any attempt to pass over or around the cup and midfield will be poorly executed or easily intercepted by a defender. Note that the deep-deep does not play very deep unless they are moving to defend a deep cutter. If this does occur, they should communicate this shift to one of the wings, who can help defend the abandoned space.