Diver down flag. A diver down flag, or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Internationally, the code flag alfa/alpha, which is white and blue, is used to signal that the vessel has a diver down and other vessels should keep well clear at slow speed.
Familiarize yourself with some friendly network cables and take a closer look at common types of network media, including twisted-pair cable, coaxial cable, fiber-optic cable, and wireless.
Guide to the Types of Wires used in your Entertainment System. Used primarily for TV, Satellite, and Cable Modems. 3 coaxial wires together can also be adapted to work as component or composite wires. In rare cases, Coax can also be used for security cameras or for digital audio. It can also be used move video between rooms: to share a Tivo or cable/satellite box output on 2 TVs. There are 2 types of Coaxial Cable: RG-59 & RG-6.