Below are all of the ranks you can purchase on WavyMC. These ranks are permanent, and will not go away.
Note: If you are upgrading from one rank to a different rank, you will only pay the difference. For example, if you are upgrading from the Captain Rank to the Pirate Rank, you will only have to pay the difference between the two, and not the full price of the rank. In addition, you will also receive the perks/kits from all ranks below your current rank.