Final answer:
As the give way vessel, one must alter course and/or adjust speed to safely pass behind the stand-on vessel, acting predictably to avoid a collision on the water.
Step-by-step explanation:
When you are crossing paths with another vessel and you are the give way vessel, you should take action to avoid a collision. This typically means altering your course to pass behind the other vessel (the stand-on vessel), slowing down, or stopping if necessary. It's important to act predictably so the other vessel can understand your intentions and maintain a safe environment on the water.
Rules for navigating waterways, much like rules of the road for vehicles, are meant to prevent accidents and ensure that all operators can predict the actions of other vessels. So, the correct answer is to alter your course and/or adjust your speed to safely avoid a collision.