### Question
How does the law define whistle?


### Answer
Under *33 U.S.C. § 2032*, **whistle** is defined as:

> any sound signaling appliance capable of producing the prescribed blasts and which complies with specifications in Annex III to these Rules.

#### Citation:
  - *33 U.S.C. § 2032*
  - Heading: **CHAPTER 34-INLAND NAVIGATIONAL RULES > SUBCHAPTER I-RULES > Part D-Sound and Light Signals**

