Sand and silt are both examples of granular materials, which are collections of separate particles and distinct particles, such as raw flour in a container or jellybeans in a jar.The most common forms of sand and silt are composed of tiny fragments of quartz.
Rip tides, also known as rip currents, are strong narrow currents that can pull swimmers out to sea. Some rip tides are so strong that they can drag swimmers away from shore before they realise what is happening. Swimmers should keep an eye out for rip tides while swimming in the sea at the beach. Rip tides can be identified by discoloured water, choppy waves and a foamy surface. They can be filled with debris. Swimmers are told to remember the âthree Rsâ if they become caught in a rip tide.
All personal Water Craft utilise the standardised Hull identification numbering format used by US boat manufacturers and which is almost identical to the ISO standard. The hull identification number is found on the aft section of every PWC on a plate and the inboard engines also carry a serial number stamped into the engine block or marked on a plate. In addition many PWCâs are fitted with âDatatagâ which carries the principle identification data. Out boards: