Genoa

A large foresail that overlaps the mainsail, commonly used on sailing yachts to improve speed and performance in light to moderate winds.

A Genoa, also known as a “Genny,” is a type of headsail used on sailing vessels, particularly yachts. It is a variation of the jib sail but is significantly larger, often extending beyond the mast and overlapping the mainsail. The Genoa is typically used in lighter wind conditions, as its large surface area allows it to capture more wind and provide greater propulsion. The sail is attached to the forestay, which runs from the top of the mast to the bow of the boat, and it is controlled using sheets (ropes) that adjust its angle relative to the wind.

Genoas are categorised by the percentage of overlap they have with the mainsail. For example, a 150% Genoa overlaps the mainsail by 50%. This overlap helps to create a more efficient airflow over both sails, increasing the boat’s speed. However, in stronger winds, the large surface area of the Genoa can become a disadvantage, as it can overpower the boat and make it difficult to control. In such conditions, sailors may switch to a smaller jib or reef the Genoa to reduce its size.

The Genoa is a versatile sail, offering excellent performance in a wide range of wind conditions, and is a staple on many cruising and racing yachts. However, it requires careful handling and trimming to maximise its effectiveness and avoid overpowering the boat.