The process of sliding a stone down the sheet is known as the delivery or throw.
The players, with the exception of the skip, take turns throwing and sweeping; when one player (e.g., the lead) throws, the players not delivering (the second and third) sweep (see Sweeping, below).
When the skip throws the vice-skip takes his or her role.

The skip, or the captain of the team, determines the desired stone placement and the required weight, turn, and line that will allow the stone to stop there.
The placement will be influenced by the tactics at this point in the game, which may involve taking out, blocking or tapping another stone.

The weight of the stone is its velocity, which depends on the leg drive of the delivery rather than the arm.

The turn or curl is the rotation of the stone, which gives it a curved trajectory.

The line is the direction of the throw ignoring the effect of the turn.

The skip may communicate the weight, turn, line, and other tactics by calling or tapping a broom on the ice.
In the case of a takeout, guard, or a tap, the skip will indicate the stones involved.

Before delivery, the running surface of the stone is wiped clean and the path across the ice swept with the broom if necessary, because any dirt on the bottom of a stone or in its path can alter the trajectory and ruin the shot.
Intrusion by a foreign object is called a pick-up or pick.

The thrower starts from the hack.
The thrower's gripper shoe (with the non-slippery sole) is positioned against one of the hacks; for a right-handed curler the right foot is placed against the left hack and vice versa for a left-hander.
The thrower, now in the hack, lines the body up with shoulders square to the skip's broom at the far end for line.

The stone is placed in front of the foot now in the hack.
Rising slightly from the hack, the thrower pulls the stone back (some older curlers may actually raise the stone in this backward movement) then lunges smoothly out from the hack pushing the stone ahead while the slider foot is moved in front of the gripper foot, which trails behind.
The thrust from this lunge determines the weight and hence the distance the stone will travel.
Balance may be assisted by a broom held in the free hand with the back of the broom down so that it slides.
One older writer suggests the player keep "a basilisk glance" at the mark.

There are two common types of delivery currently, the typical flat-foot delivery and the Manitoba tuck delivery where the curler slides on the front ball of his foot.

When the player releases the stone a rotation (called the turn) is imparted by a slight clockwise or counter-clockwise twist of the handle from around the two or ten o'clock position to the twelve o'clock on release.
A typical rate of turn is about ​2 ¹⁄₂ rotations before coming to a rest.

The stone must be released before its front edge crosses the near hog line, and it must clear the far hog line or else be removed from play (hogged); an exception is made if a stone fails to come to rest beyond the far hog line after rebounding from a stone in play just past the hog line.
In major tournaments the "eye on the hog" sensor is commonly used to enforce this rule.
The sensor is in the handle of the stone and will indicate whether the stone was released before the near hog line.
The lights on the stone handle will either light up green, indicating that the stone has been legally thrown, or red, in which case the illegally thrown stone will be immediately pulled from play instead of waiting for the stone to come to rest.
The process of sliding a stone down the sheet is known as the delivery or throw. The players, with the exception of the skip, take turns throwing and sweeping; when one player (e.g., the lead) throws, the players not delivering (the second and third) sweep (see Sweeping, below). When the skip throws the vice-skip takes his or her role.
The skip, or the captain of the team, determines the desired stone placement and the required weight, turn, and line that will allow the stone to stop there. The placement will be influenced by the tactics at this point in the game, which may involve taking out, blocking or tapping another stone.
The weight of the stone is its velocity, which depends on the leg drive of the delivery rather than the arm.
The turn or curl is the rotation of the stone, which gives it a curved trajectory.
The line is the direction of the throw ignoring the effect of the turn.
The skip may communicate the weight, turn, line, and other tactics by calling or tapping a broom on the ice. In the case of a takeout, guard, or a tap, the skip will indicate the stones involved.
Before delivery, the running surface of the stone is wiped clean and the path across the ice swept with the broom if necessary, because any dirt on the bottom of a stone or in its path can alter the trajectory and ruin the shot. Intrusion by a foreign object is called a pick-up or pick.
The thrower starts from the hack. The thrower's gripper shoe (with the non-slippery sole) is positioned against one of the hacks; for a right-handed curler the right foot is placed against the left hack and vice versa for a left-hander. The thrower, now in the hack, lines the body up with shoulders square to the skip's broom at the far end for line.
The stone is placed in front of the foot now in the hack. Rising slightly from the hack, the thrower pulls the stone back (some older curlers may actually raise the stone in this backward movement) then lunges smoothly out from the hack pushing the stone ahead while the slider foot is moved in front of the gripper foot, which trails behind. The thrust from this lunge determines the weight and hence the distance the stone will travel. Balance may be assisted by a broom held in the free hand with the back of the broom down so that it slides. One older writer suggests the player keep "a basilisk glance" at the mark.
There are two common types of delivery currently, the typical flat-foot delivery and the Manitoba tuck delivery where the curler slides on the front ball of his foot.
When the player releases the stone a rotation (called the turn) is imparted by a slight clockwise or counter-clockwise twist of the handle from around the two or ten o'clock position to the twelve o'clock on release. A typical rate of turn is about ​2 ¹⁄₂ rotations before coming to a rest.
The stone must be released before its front edge crosses the near hog line, and it must clear the far hog line or else be removed from play (hogged); an exception is made if a stone fails to come to rest beyond the far hog line after rebounding from a stone in play just past the hog line. In major tournaments the "eye on the hog" sensor is commonly used to enforce this rule. The sensor is in the handle of the stone and will indicate whether the stone was released before the near hog line. The lights on the stone handle will either light up green, indicating that the stone has been legally thrown, or red, in which case the illegally thrown stone will be immediately pulled from play instead of waiting for the stone to come to rest.
Curling