Formation flying

One speaks of a formation when a number of aircraft perform flight maneuvers in groups. All aircraft in a formation follow a designated formation leader. This is responsible for the entire flight course of the formation. The smallest unit within a formation is the ‘element’. An element consists of two planes. In the formation, each aircraft has a sequence number #1, #2, #3, #4 etc. The numbering starts with the leader. Each aircraft also has a fixed position in the formation. This position is determined by the serial number of the aircraft and the formation shape (the pattern of the formation) in which the aircraft is flown.
Some of the formation shapes that the DTY Display Team showcases in the show are shown here.

In the Finger (-left/-right) formation, #2 in the formation is on one side of the leader while the remaining planes are in echelon on the other side of the leader.
In the Echelon (-left/-right) the planes are diagonally behind the leader (left or right) at an angle of about 45°.
In the Vic formation #2 is behind the leader on the right and #3 is behind the leader on the left. This formation is widely used due to its maneuverability.
In the Box of Diamond formation, #2 is behind the leader to the right, #3 is behind the leader to the left, and #4 is directly behind the leader. This formation is widely used due to its maneuverability.
In the Line astern, the planes are in a line directly behind the leader.
In the Swan formation #2 and #3 are to the right and left of #4. The formation shape that then arises resembles a flying swan.
In the House formation, two elements fly in line astern left and right in Vic behind the leader.
In the Stingray formation, a Box formation is expanded with a 5th aircraft located in line astern behind #4.