Tilting the ring resulted in asymmetric thrust for directional control. Wireless communications (with exception to point-to-point radio links using directional antennas) are inherently broadcasting media. Standing on blocks marked with directional arrows changes the direction of Mario's jump. It upgrades its obstacle avoidance with five directional sensors. Both incorporated separate amber flashers for directional indicators. It is said to provide "two-dimensional navigation" for scrolling through items with its directional pad. Similar comments can be made regarding power dividers and directional couplers. The system allows for light attacks, heavy attacks and directional attacks. Sound often changes the perceived hue, brightness, scintillation, and directional movement. Its crystalline structure shows some evidence of directional bonding. Setting formula 29 identifies the Lie derivative of a function with the directional derivative. The provides an example of simple directional selection. This means it is capable of directional hearing. Disruptive selection favors both extreme phenotypes, different from one extreme in directional selection. The tail was most likely only used for helping in directional control.