The red and yellow flags indicate the safest place to swim when lifeguards and lifesavers patrol beaches
Find out more about beach safety.
A rip is an intermittent strong surface current flowing seaward from the shore.
Water safety experts provide advice on exactly what a rip is, how a rip behaves, how to recognise a rip and what to do if you are caught in a rip.
Different experts have different opinions about the best way to get out of a rip.
For information on surf safety and rips visit these sites:
Surf Educators International