The primary measure of instruction effectiveness is . Regulations typically set a maximum donning time of 120 seconds, yet research published in Safety Science indicates that over 90% of participants often exceed this limit. This delay is rarely due to physical inability but rather to "cognitive friction"—the time spent deciphering complex buckles or straps under pressure. For lifejackets to be effective, they must be intuitive and fall naturally into the wearer's anatomical shape. Standard Instructional Steps
Cross your arms over your chest and grab the shoulder straps of the lifejacket. Pull upward firmly. If the jacket slides up past your chin or nose, the straps are too loose. Tighten the waist and crotch straps and try again. eval lifejacket donning instructions
Confirm that the whistle is securely attached and that the retro-reflective tapes are clean and intact. If equipped with a lifejacket light, ensure it is within its expiry date. The primary measure of instruction effectiveness is