Eval Lifejacket Donning Instructions

| Criterion | Score (1–5) | Comments | |-----------|-------------|----------| | Visual clarity | 3 | Only line drawings; no indication of front vs back | | Text readability | 2 | Font size ~2 mm; step 3 mixes “belt” and “buckle” without diagram | | Step sequence | 4 | Logical, but step 4 (inflation) should be after all straps adjusted | | Self‑check cues | 1 | None – no “pull up on shoulders to test fit” | | Failure warnings | 1 | No warning about crotch strap (if present) or inversion risk | | Symbol compliance | 2 | Uses “pull” symbol, but no IMO donning order symbols | | No language dependency | 2 | Fails without English text | | Emergency focus | 3 | Includes storage info in donning section (distraction) |

Overall: Not adequate for untrained users in darkness. eval lifejacket donning instructions

Critique of Standard Instructions: Most current instructions are superficial because they command compliance ("Do this") rather than understanding ("Do this because"). | Criterion | Score (1–5) | Comments |

Conclusion: The crotch strap is the single most critical failure point in lifejacket design and instruction. It is the bridge between the device and the human. Without deep comprehension of its role in physics, the user is likely to treat it as optional, rendering the lifejacket significantly less effective. Conclusion: The crotch strap is the single most

Use this checklist to don a typical adult lifejacket (Type I/II/III/V) safely and quickly. Follow manufacturer instructions if available.