46 CFR §160.176-3

1. (a)Commandant means the Commandant means the Chief of the Lifesaving and Fire Safety Standards Division. Address: Commandant (CG-ENG-4), Attn: Lifesaving and Fire Safety Division, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue, SE., Washington, DC 20593-7509; telephone 202-372-1392 or fax 202-372-1924.
2. (b)First quality worksmanship means construction which is free from any defect materially affecting appearance or serviceability.
3. (c)Functional deterioration means—
   1. (1)Damage such as deformation in hardware or a rip, tear, or loose stitches;
   2. (2)Decline in any performance characteristic; or
   3. (3)Any other change making the lifejacket unfit for use.
4. (d)Functional residual capacity (FRC) means the amount of lung volume a person has remaining at the bottom of the normal breathing cycle when at rest.
5. (e)Inflation medium means any solid, liquid, or gas, that, when activated, provides inflation for buoyancy.
6. (f)Inspector means an independent laboratory representative assigned to perform the duties described in § 160.176-15 of this subpart.
7. (g)PFD means personal flotation device as defined in 33 CFR 175.13.
8. (h)Reference vest means a model AK-1 PFD meeting subpart 160.047 of this part, except that, in lieu of the weight and displacement values prescribed in Tables 160.047-4(c)(2) and § 160.047-(4)(c)(4), each front insert must have a weight of kapok of at least 8.25 oz. and a volume displacement of 9.0 ±0.25 lb., and the back insert must have a weight of kapok of at least 5.5 oz. and a volume displacement of 6.0 ±0.25 lb. To achieve the specified volume displacement, front insert envelopes may be larger than the dimensions prescribed by § 160.047-1(b).
9. (i)[Reserved]
10. (j)Second stage donning means adjustments or steps necessary to make a lifejacket provide its intended flotation characteristics after the device has been properly donned and then inflated.