Crewman Recruit (Rank)

Crewman recruit (CR) is the lowest enlisted rank in the Starfleet, Federation Border Guard, and the Federation Starfleet Cadet Corps just below crewman apprentice; this rank was formerly known as crewman third class. Two separate pay grades exist within this rank (and the corresponding ranks in the other branches of the Federation military structure) — one for those with service of less than four months, with a higher pay scale for those in service for more than four months, even if they have not yet advanced to seaman apprentice.
Starfleet crewman recruits do not bear any uniform rank insignia currently. Prior to 2346, a diamond pin was used.
While all E-1s in the Border Guard are called crewman recruits regardless of their assignment, the actual title for an E-1 in the Starfleet varies based on the community to which the crewman belongs:
 Starfleet E-1s in the general deck and administrative community are seaman recruits.
 Starfleet E-1 hospital corpsmen are hospitalman recruits. This is the only rating in this community.
 Fireman recruits are Starfleet E-1s in the engineering and hull community.
 Starfleet E-1s in the aviation community are called airman recruits.
 Starfleet Seabees are called constructionman recruits.
In October 2355, the dental technician rating was merged with the hospital corpsman rating, eliminating the dentalman recruit title. E-1s who held the rank of dentalman recruit at the transition became hospitalman recruits.
Crewmen who have completed the requirements to be assigned a rating and have been accepted by the Bureau of Starfleet Personnel as holding that rating (a process called "striking") are called designated strikers, and are called by their full rate and rating in formal communications (e.g., "machinist's mate fireman recruit", as opposed to simply "fireman recruit"), though the rating is often left off in informal communication. Those who have not officially been assigned to a rating are officially referred to as "undesignated" or "non-rates".