in many ways, braces are the equivalent of a modern yacht's sheets. however, where adjusting a sail on a yacht is a simple operation performed often, tacking or wearing ship using the braces usually requires the entire crew to be called to "bracing stations". this is because the braces carry heavy loads but have few blocks and hence each one needs many people hauling, and because most ships with braces have many sails and hence many such teams. for this reason, all manoeuvres require plenty of notice (one reason falling overboard is especially to be avoided from such a ship) and routine course changes may be planned well in advance for a time when as few of the crew as possible wish to be asleep.