Besars ship and the '' Gerrymander '' both approach Krakatoa the following morning and find the island 's volcano erupting . Despite their fear of the volcano , both the '' Gerrymander '' s men and Besars pirates go ashore and climb the mountain , with each party racing the other to be the first get to a temple at the mouth of the volcano where the diamonds supposedly have been hidden . During the climb , Boll spots Kim Kim on the shore below . As the eruption becomes more powerful and lava begins to flow down the mountainside , Boll and the crew of the '' Gerrymander '' decide that the situation has become too dangerous for them to continue their climb to the diamonds ; instead , they rescue Kim Kim , return to the '' Gerrymander '' , and head out to sea . Besar and his men also soon give up on finding the diamonds and put to sea in their own ship to flee the volcano . Boll expects the eruption to generate a huge tsunami , so he orders his crew to set the sea anchor and turns the '' Gerrymander '' toward Krakatoa to ride out the wave , which she successfully does . Besar instead makes the mistake of trying to outrun the tsunami , which capsizes his ship . He and his crew drown
the island 's volcano erupting
1883 eruption of Krakatoa
Fair Wind to Java