### Question
What does propulsion machinery mean?


### Answer
**Propulsion machinery** has the following meaning in *46 U.S.C. § 4312*:

> a self-contained propulsion system, and includes, but is not limited to, inboard engines, outboard motors, and sterndrive engines

#### Citation:
  - *46 U.S.C. § 4312*
  - Heading: **Subtitle II-Vessels and Seamen > Part B-Inspection and Regulation of Vessels > CHAPTER 43-RECREATIONAL VESSELS**

