Cubatur, the company promoting the initiative, explained thatnbsp;tourists, numbering approximately 20 at a time, will be able tonbsp;dive to the wreckages of the armoured cruisers Cristóbal Colón,nbsp;Almirante Oquendo and Vizcaya, as well as the destroyers Furornbsp;and Plutón. Together, these ships, comprised the Spanish armadanbsp;commanded by Admiral Pascual Cervera that fought an unevennbsp;battle against two US flotillas on July 3, 1898.nbsp; The sixth ship available for divers to observe is the steamshipnbsp;USS Merrimac.