In order to ensure the quality of catches, keeping fresh is one of the important functions of fishing boats. The preservation methods on board generally include ice storage, cold sea water preservation, salt storage, micro-freezing, freezing, etc.

Fishing vessels are vessels used to catch and collect aquatic animals and plants. It also includes some auxiliary vessels for modern fishing production, such as those engaged in aquatic product processing, transportation, aquaculture, resource survey, fishery guidance and training, and those carrying out fishery administration tasks.