What should you NOT do when preparing to fuel your boat?

When preparing to fuel your boat, it is important to create a safe environment to prevent any potential fire hazards. Keeping all doors and windows open is not advisable because it can increase the risk of igniting fuel vapors, which are heavier than air and can accumulate in enclosed spaces. Instead, it's safer to ensure that the boat is well-ventilated but also that you minimize the chances of vapors igniting.

In contrast, checking fuel lines for leaks, shutting off all open flames onboard, and having a fire extinguisher within reach are crucial precautions. Checking for leaks helps ensure that there are no potential sources of ignition created by escaping fuel. Shutting off all flames eliminates any sources of ignition, and having a fire extinguisher ready means you can respond quickly in case of an emergency. These actions collectively enhance safety while fueling.