Since most midshipmen were from the gentry or had family connections with sailing ships, many used their connections to have their names placed on a ship's books. The practice, known colloquially as "false muster" was common even though it was technically illegal and frowned upon. This allowed some boys to be promoted to midshipmen, or in some cases lieutenant, without having completed the required amount of time at sea. A notable example was Thomas Cochrane, whose uncle had him entered at the age of five; his name was carried on various ships until he was 18 and received his commission.