BOATsmart! Canada
Knowledge Base

Sound-signalling devices are used to signal distress or your need for assistance, to alert other boats of your position in poor visibility, and for navigation purposes.

All boats are required to carry some form of sound-signalling device, such as a whistle or horn (depending on your type and size of boat). Approved sound-signalling devices and appliances must be audible for a minimum of 0.93 km.

Types of sound-signalling devices include:

Attach a Marine Blast Whistle to your life jacket or PFD so that you’ll be able to signal for help if you become stranded in the water.