46 CFR 199.170: Line-throwing appliance.

(a) General. Each vessel must have a line-throwing appliance approved under approval series 160.040.

(b) Stowage. The line-throwing appliance and its equipment must be readily accessible for use.

(c) Additional equipment. Each vessel must carry the following equipment for the line-throwing appliance—

(1) The equipment on the list provided by the manufacturer with the approved appliance; and

(2) An auxiliary line that—

(i) Is at least 450 meters (1,500 feet) long;

(ii) Has a breaking strength of at least 40 kiloNewtons (9,000 pounds-force); and

(iii) Is, if synthetic, of a dark color or certified by the manufacturer to be resistant to deterioration from ultraviolet light.