Life Sling 2 is US CG approved type IV device--and should have the label in the unit. The older Type Life Sling is not CG approved. Canada I have a question about. We sailed in Canadian waters for a number of years with a Life Sling 2 aboard. We were boarded by CG Canada, and no problem with the "life Sling 2" However in the past Transport canada required the traditional Ring Buoy
Current ISAF OFFSHORE SPECIAL REGULATIONS
Canadian Yachting Association Prescriptions
JANUARY 2012 - DECEMBER 2013 states the following: "here CYA prescriptions specify items meeting Canadian laws, in some cases Transport Canada permits visiting yachts to use equipment that complies
with the laws of the country in which the yacht is usually
kept....CYA prescribes that where the word "Lifesling" is used it shall be read as the "Lifesling or functional equivalent". CYA prescribes that the lifebuoy in OSR 4.22.1 a) above shall be a Lifesling."
Transport Canada safe boating guide notes that for our size boat:
"2. One (1) buoyant heaving line at least 15 m (49’3”) long
OR
One (1) lifebuoy attached to a buoyant line at least 15 m (49’3”) long
3. *One (1) reboarding device" (The reboarding device is required if the gunnel is over 1" 8" from the water).
Current Transport Canada web site states: "Lifebuoys
When buying a lifebuoy look for a Transport Canada approval sticker. Store this piece of equipment where it can be easily accessed in an emergency. Lifebuoys must be at least 610 mm (24 inches) in diameter. Smaller lifebuoys and horseshoe-type devices are not approved."
So it sounds to me to be proper in Canada, that the ResQ disc would count as the needed device. (although it would not in the US, since there is no requirement for a floating line.)