Radar Reflectors
A passive radar reflector can help a radar-equipped vessel detect your vessel. Vessels less than 20 metres long or built mostly from non-metal materials must have a radar reflector mounted above the superstructure, when possible not less than 4 metres above the water. The reflector must be able to perform under the range of foreseeable environmental conditions.
The radar reflector requirement does not apply if your vessel is very small or if it operates only:
in limited traffic during daylight hours when the visibility is good; or
where no vessels use radar.
Refer to Ship Safety Bulletin 07/2008: The Importance of Properly Fitting an Effective Radar Reflector on Small or Non-Metallic Vessels for more information on the need to carefully select and install radar reflectors.
Remember: Having a radar reflector simply helps you be seen. You still have to keep a proper lookout for other vessels.