How were the early LCMs crewed?

Did each early Landing Craft Mechanised have six crew and an officer?

Each craft had six crew, with one officer assigned for every three craft rather than one officer aboard each boat.

Each Landing Craft Mechanised carried six crew, with one officer assigned to every group of three. This kept the complement of each boat small without requiring a commissioned officer aboard every hull. It also explains why personnel figures differ between descriptions of one craft and a three-craft unit.