Spinnaker booms and multiple jibs are rarely seen. These boats used conventional gaff mainsails and jibs, attached to the mast by travellers. Jibs and spinnakers are the two main types of headsails on a modern boat. Roller furling is typically used for foresails such as jibs or genoas. Five jibs are fixed to the bowsprit. In strong winds roller-furling jibs do not perform well and may tend to unroll. This is especially true of mainsails and high aspect jibs. The simplest and most common furling systems are for jibs and other headsails. ARVs may have winches, jibs, cranes, and/or bulldozer blades to aid in tank recovery. In this traditional definition a sloop could have multiple jibs on a fixed bowsprit. Her six-sail battle configuration consisted of jibs, topsails, and driver. It adds catch free tips and tails for jibs, rails, and forgiving landings. Schooners typically have up to three jibs. Large features include jumps along with complex jibs and large vertical pipes. No lights or equipment of any sort including jibs, trolleys etc. were used.