One Piece Universe Ranks

Unit Commander: This is the first real rank that one can attain as a pirate with benefits. It is one of the commanders that serve directly under a Yonko or one of the Pirate Lords. One must have a minimum of 35,000 Haki to achieve this rank and be chosen by their Yonko or ask them for employment in their service. If not available one may ask an admin/moderator. (Unit Commanders receive a +3 boost to all stats temporarily as long as they hold the rank.)

Yonko: The Yonko are the Pirate lords and typically the strongest pirates in all existence. They usually have large fleets of ships and have Unit Commanders serving under them to keep the various rank and file productive. One must have a minimum of 75,000 Haki in order to become established as a Yonko. (Yonko receive a +6 boost to all stats temporarily as long as they hold the position and also get a permanent 5,000 Haki boost upon attaining the rank.)

Shichibukai: The Shichibukai are pirates that have been sactioned by the World Government and Marines to operate freely and on official government orders. They are to refrain from any illegal activity as they are still held accountable by the Government. Engaging in any illicit illegal activity can make it so a Shichibukai's status is revoked and are returned to being a wanted criminal. One must have a minimum of 75,000 Haki in order to become a Shichibukai and be given sactioned status by a majority vote from the Marine Admiral's or by the Fleet Admiral themselves. One may also ask an admin/moderator if the previous options are not available. (Shichibukai receive a +6 boost to all stats temporarily as long as they hold the position and also get a permanent 5,000 Haki boost upon attaining the rank.)

Pirate King: As the title says this individual is the King of the Pirates. They are the De Facto leader of all the pirates and are typically the most powerful and has the largest fleet beneath them. They do not have any direct relation with the Yonko but the Yonko will typically respect the King's decisions. One who wishes to become the Pirate King must have at least 100,000 Haki. (Pirate Kings receive a +10 boost to all stats temporarily as long as they hold the position and also get a permanent 5,000 Haki boost upon attaining the rank.)

Vice Admiral: This is the opposite of the Unit Commander for the pirates and is the first rank for a Marine's real advancement. They do not directly serve under any particular admiral but the admirals are their superiors. They must have a minimum of 35,000 Haki to become a Vice Admiral and must be promoted by an Admiral or Fleet Admiral. If unavailable one may ask an admin/moderator. (Vice Admirals receive a +3 boost to all stats temporarily as long as they hold the rank.)

Admiral: The Admirals are the face of the Marines and are the wide majority of their military power as well. They answer directly to the Fleet Admiral and have the Vice Admirals as adjutants under them. They are typically appointed by the Fleet Admiral for promotion from Vice Admiral but if not available an admin/moderator can be asked. One must have a minimum of 75,000 Haki to promoted to the rank of Admiral. (Admirals receive a +6 boost to all stats temporarily as long as they hold the position and also get a permanent 5,000 Haki boost upon attaining the rank.)

Fleet Admiral: This individual is the head of the entire Marine Organization. They are the direct superior of the Admirals and typically make any major decisions regarding the organization. One who wishes to become the Fleet Admiral must have been an Admiral previously and has to have 100,000 Haki at a minimum. (Fleet Admirals receive a +10 boost to all stats temporarily as long as they hold the position and also get a permanent 5,000 Haki boost upon attaining the rank.)