46 C.F.R. § 108.597 – Line-throwing appliance.

(a) General. Each unit in international service must have a line-throwing appliance that is approved under approval series 160.040. Each unit not in international service must carry a line-throwing appliance approved under either approval series 160.040 or 160.031.
(b) Stowage. The line-throwing appliance and its equipment must be readily accessible for use.
(c) Additional equipment. Each unit must carry the following equipment for the line-throwing appliance:
1. (1) The equipment on the list provided by the manufacturer with the approved appliance; and
2. (2) An auxiliary line that—
  1. (i) Has a breaking strength of at least 40 kiloNewtons (9,000 pounds-force);
  2. (ii) Is, if synthetic, a dark color or certified by the manufacturer to be resistant to deterioration from ultraviolet light; and
  3. (iii) Is—
    1. (A) At least 450 meters (1,500 feet) long, if the line-throwing appliance is approved under approval series 160.040; or
    2. (B) At least 150 meters (500 feet) long, if the line-throwing appliance is approved under approval series 160.031.