In this blog, we will look at how to trim your sails when sailing upwind. Sailing upwind is classified as sailing at any angle lower than 90 degrees to the wind. Sailing directly into the wind is not possible; therefore, to sail in the direction of the wind, you must continuously tack in a zig zagging motion.

The most efficient way to trim your sails when tacking upwind is to have them close hauled. This means pulling them as close to the centerline of the boat as possible. This will allow you to point higher and therefore get to your destination faster.

Whether you are pointing 90 degrees or 45 degrees to the wind, this blog will be helpful in demonstrating how to use your vessel’s instruments to improve the trim and get the most speed out of your boat.

This video and blog demonstrations were produced onboard a Lagoon 42 sailing catamaran but can be used on any sailing vessel.

TELLTALES

Learning how to trim your sail is a crucial skill for any sailor. Luckily, there are some useful instruments that can help make the task a bit easier. These instruments, called telltails, are ribbons attached to the sail that indicate airflow over the front and back sides. Ideally, you want the telltails to be in a linear motion, indicating a smooth airflow around both sides of the sail. If they are not, it means the sail is inefficient and needs to be adjusted. 

JIB/ GENOA

• If the sails are let out too far: the telltale on the inside or windward side (the side facing the wind) will flap. If the inside telltale is flapping you need to pull the sail tighter. 
• If the sails are too tight: the telltale on the outside or downside side (the side facing away from the wind) will flap. If the outside telltale is flapping you need to let off the sail. 

A simple way to remember this is that when you are sailing upwind you want to bring the sail towards the flapping telltale.