Which piece of equipment is particularly important for sailors to bring on board?

A bailer is particularly important for sailors to bring on board because its primary function is to remove water from the boat. When sailing, especially in smaller vessels or those that are not completely sealed, water can accumulate in the hull due to waves, rain, or other sources. Having a bailer allows sailors to effectively manage and remove this water, helping to maintain the boat's stability and safety. Keeping the vessel free of excess water is essential to prevent capsizing and to ensure a safe sailing experience.

While a sun hat offers protection from the sun, and a cooler can be useful for storing food and drinks, they do not impact the immediate safety and operational readiness of the boat. A compass is valuable for navigation, but when it comes to the critical need to ensure water is cleared from the boat, the bailer stands out as an essential piece of equipment for sailors.