These lists contain the names of officers, their rank and the date of their attaining said rank (seniority). The British version for much of the 19th century can be found here in a non-sequential fashion; they start out with the flag officers, followed by captains, and then other ranks, including who is in charge of individual ports and hospital. Non-commissioned officers are also included; i.e., masters, chaplains, surgeons, pursers, etc. Tables for pay and half-pay along with correspondence from the Admiralty are appended. British navy lists for the 20th century (mostly for WWI and WWII) are online; these are arranged differently than their earlier counterparts but are still easy to navigate. American navy lists (technically called naval registers), again in scattered runs, are accessible electronically.