Before you leave the dock with guests, especially those new to the boat and non boaters, give a brief safety briefing. Include the location on the PFDs, the first aid kit and emphasize that under no circumstances are they to fend off during docking as the boat is easier to repair than they are. Tell them where they can and cannot go while underway. For example, on our boat people cannot go on the sun deck without alerting the helmsperson so that the radar can be put on standby. It also helps to give a brief introduction to the head including the limits on what can be put in it.