Types of Flags
Two types of flags are used to indicate diving activity.
![Canadian diving buoy Canadian diving buoy](https://ke-courses-production.s3.amazonaws.com/asset_files/production/2199/attachments/original/CN-buoy-dive.jpg?1551796351)
A rectangular red flag with a white diagonal stripe is attached to a buoy to mark the diving location. The flag must be at least 50 centimetres square.
![Alpha Flag Alpha flag: blue-and-white flag](https://ke-courses-production.s3.amazonaws.com/asset_files/production/1605/attachments/original/flag_alpha.jpg?1504019521)
A blue-and-white International Code Flag A (or Alpha flag) must be displayed on boats involved in a diving activity.