a single rate: Senior Chief Constructionman (CUCS). Before NAVADMIN 054/21, at the E-9 paygrade they were referred to as a Master Chief Constructionman (CUCM). Before NAVADMIN 054/21, the remaining Seabee rates combined only at the E-9 paygrade: Master Chief Equipmentman (EQCM) for Equipment Operator and Construction Mechanic. Master Chief Utilitiesman (UCCM) for Construction Electrician and Utilitiesman. Per NAVADMIN 054/21: Constructionman Master Chief (CUCM), Equipmentman Master Chief (EQCM) and Utilities Constructionman Master Chief (UCCM) renamed Seabee Master Chief (CBCM). Those Master Chiefs already in CUCM, EQCM or UCCM ratings were to be automatically converted to CBCM on 15 March 2021, but current source ratings badges were to be retained. Diver is a qualification that the various rates can obtain with three grades: Basic Underwater Construction Technician/ NEC 5932 (2nd Class Diver), Advanced Underwater Construction Technician/ NEC 5931 (1st Class Diver), and Master Underwater Construction Technician/ NEC 5933 (Master diver). Seabee divers are attached to five principal commands outside the NCF: UCT ONE, Little Creek, VA. UCT TWO, Port Hueneme, CA. Naval Facilities Engineering Service Center (NFESC) that has detachments in Port Hueneme, CA, and in the Washington Navy Yard, DC. These are CEC officer billets only. Those at Port Hueneme are with the highly technical NFESC "Dive Locker Team". Navy System Commands, e.g., NAVSEA or NAVAIR. These are CEC officer billets only. NEDU/NDSTC (Navy Experimental Diving Unit Navy Diving & Salvage Training Center) The "Seabee" and Unit insignias On 1 March 1942 the RADM Moreell recommended that an insignia be created to promote esprit de corps in the new CBs to ID their equipment as the Air corps did to ID squadrons. It was not intended for uniforms. Frank J. Iafrate, a civilian file clerk at Quonset Point Advance Naval Base, Davisville, Rhode Island, who created the original "Disney Style" Seabee. In early 1942 his design was sent to RADM Moreell who made a single request. That the Seabee being set inside a letter Q, for Quonset Point, be changed to a hawser rope and it would be officially adopted. The Seabees had a second Logo. It was of a shirtless constructionman holding a sledge hammer with a rifle strapped across his back standing upon the words "Construimus Batuimus USN". The figure was on a shield with a blue field across the top and vertical red and white stripes. A small CEC logo is left of the figure and a small