To change patterns on the vari-nozzle, you must __________ the black tip.

To change patterns on the vari-nozzle, you must twist the black tip. This action engages the internal mechanism of the nozzle that adjusts the spray pattern. Twisting the tip alters the orientation of the internal components, allowing for a range of spray options, from a narrow stream to a wider fog pattern. This is a crucial operation, especially in firefighting scenarios where different levels of water distribution may be needed to effectively combat a fire or manage a hazardous situation. Properly performing this action ensures that the boat crew member can adapt to varying conditions and requirements effectively.