Z vzponom industrije vodnega prometa in razvojem ladjedelniške industrije je obremenitev ladje postajala vse večja, transportna zmogljivost pa se je močno izboljšala, zato so se izboljšale tudi zahteve za plovbo po kanalih.
Za kanal je tudi razdeljen na več nivojev. V preteklosti nekatere zahteve glede globine vode v kanalu niso mogle izpolniti navigacijskih zahtev vodnega območja, zato je treba v kanalu za plitvo vodo nastaviti opozorilne pozicionirne točke, ki opozarjajo na varnost plovbe navigacijskih plovil. Takšni opozorilni znaki običajno uporabljajo plastiko
buoys to ensure that only ships on water can see them. At night, the buoys are equipped with solar beacon lights to ensure that they can be seen from afar and work. Some channels will be connected to the LAN according to the use requirements, and displayed on the radar, so that passing ships can be displayed and marked on electronic equipment, so that the preparation time can be adjusted in advance to avoid danger.
The water plastic channel buoy is made of high-strength polyethylene plastic through rotational molding technology. The obvious advantage of this material is that it has good corrosion resistance and wear resistance, and can be used for a long time in harsh seawater environment. Compared with the early steel navigation aids, the channel buoys have multiple advantages, such as maintenance free, low cost and long service life.
