Extend your left arm at a 45 degree angle, with the palm of your hand facing forward.
 

Extend your left arm at a 45 degree angle, and move your hand up and down.

RIGHT TURN

Raise your left arm horizontal, with your elbow bent 90 degrees vertically.
 

LEFT TURN

Raise your left arm horizontal, with your elbow fully extended.

SPEED UP

Raise your left arm up and down with your index finger extended upward. This indicates the leader wants to speed up.
 

STAGGERED FORMATION

Extend your left arm upward at a 45 degree angle, with your index and pinkie fingers extended. This indicates that it is safe to return to staggered formation.

SINGLE FILE

Position your left hand over your helmet, with your fingers extended upward. This indicates the leader wants the group in a single file formation. Usually, this is done for safety reasons.
 

TIGHTEN UP

Raise your left arm and repeatedly move up and down in a pulling motion. This indicates the leader wants the group to close ranks.