Maritime archaeologists have discovered two wrecks believed to be 17th-century warships near Stockholm. One of the wrecks, found near Vaxholm Island, is likely to be the sister ship of the iconic Swedish warship Vasa. Vasa sank on its maiden voyage in 1628, lacking the ballast to counterweight its heavy guns. The ship was salvaged in 1961 and is on display at Stockholm's Vasa Museum. Marine archaeologist Jim Hansson said divers found the wreck in an area where several vessels are known to be at the bottom of the sea including Applet, the sister ship to Vasa.