Fishing vessels are required to carry flares as described below.
The Parachute flare is easily seen from the surface or the air, and burns at least 40 seconds.
The "Multi-star" flare is also easily seen from the surface or the air. It burns four to five seconds. (If a single star shell is used, two shells should be carried for every flare.)
* For specific Regulation Requirements check the Regulations that apply to your vessel.