Locking the tiller on a sailboat can be useful when you need to leave the helm for a short time, such as adjusting the sails, checking the charts, or using the head. There are different ways to lock the tiller, depending on your boat and equipment. Some common methods are: Using a tiller lock or clamp that attaches to the tiller and the cockpit sole or coaming. This will hold the tiller in place and prevent it from moving. You can adjust the tension of the lock or clamp to allow some play or movement of the tiller if needed; Using a tiller tamer or brake that attaches to the tiller and a line that runs through two blocks on either side of the cockpit. This will create friction on the tiller and slow down its movement. You can adjust the tension of the line to control how much resistance the tiller has; Using a bungee cord or surgical tubing that attaches to the tiller and two points on either side of the cockpit, such as cleats, stanchions, or lifelines. This will create tension on the tiller and keep it centred. You can adjust the length and elasticity of the bungee cord or surgical tubing to allow some movement of the tiller if needed.