The Submarine Ring of Fire 2006 (SRoF'06) expedition will take place on the Mariana arc. It will be the third Ocean Exploration expedition to the Marianas. This image shows a global view of the Pacific Ring of Fire. The four previous SRoF expeditions are indicated at Explorer ridge, Kermadec arc, and the Mariana arc. The dashed line is the crest of the Mid-ocean ridge system and solid lines show plate boundaries defined by island arcs and trenches.