Boatswain's Mate - Navy Enlisted Rating Descriptions

Enlistees who haven't decided on their Navy career path may choose this rating

Humanitarian Efforts Continue Following Devastating Super Typhoon
AT SEA - NOVEMBER 22, 2013: In this handout photo provided by the U.S. Navy, Aviation Boatswain's Mate (Handling) Airman Jennifer L. Confer, from Buffalo, N.Y., directs a V-22 Osprey as it lifts off from the amphibious dock landing ship USS Ashland (LSD 48). This is the first-ever launch of an Osprey from the ship. Ashland is off the coast of the Philippines assisting in Typhoon Haiyan recovery efforts. U.S. Navy / Getty Images

The Navy's Boatswain's Mate rating (which is what the Navy calls its jobs) is one of the two oldest in this branch of the military, dating back to 1794.

This rating, which has Navy Occupational Specialty code number B400 allows new recruits to enlist without a specific career path identified. It's often used by some enlisted personnel who haven't decided which career to pursue (think of it as a college freshman whose major is still "undecided"), and by others who want a certain rating that may not be available at the time they enlist.


Duties Performed by Boatswain's Mates

Boatswain's Mates train, direct and supervise personnel in ship's maintenance duties in all activities relating to marlinspike (a tool used to help tie large knots), deck, boat seamanship, painting, upkeep of ship's external structure, rigging, deck equipment and, of course, boats.

Boatswain's Mates also operate and maintain equipment which may be used in a variety of areas aboard a ship, including loading and unloading cargo, ammunition, fuel and general stores.

Since this rating is kind of an all-purpose position, the duties are varied and tend to cover work not assigned to other ratings. Boatswain's Mates may serve as helmsmen and lookouts, or stand as security watches (both in port and at sea), or serve as part of a damage control, emergency or security alert team. 

Their duties may also include repairing, maintaining and stowing equipment in preparation for underway operations; doing temporary duty for 90-120 days with food services divisions or compartment cleaning; working in non-engineering divisions of the ship or station or participating in naval ceremonies.


Working Environment for Boatswain's Mates

After successful completion of recruit training, Boatswain's Mates are usually assigned to shipboard duties where the Navy needs them the most.

Boatswain's Mates can request and may receive on-the-job training in a rating that they are interested in, qualified for and which is available at their first command by completing correspondence courses and personal advancement requirements.

They must also be recommended by their commanding officer for the Navy rating they desire.

Although this rating may seem like a jack-of-all-trades job with wildly varied duties, the Navy describes Boatswain's Mates as the "backbone of every ship's crew." 

A-School Information for Boatswain's Mates

After completion of recruit training, enlistees in the Seaman Apprenticeship Training Program attend a six-weeks of training at Boatswain's Mate class "A" school in Great Lakes, Illinois.

Boatswain's Mates may also attend Navy schools to learn about general damage control, shipboard fire fighting, preventive maintenance of special equipment and the use of special tools used in the rating they are working in or seeking.

Testing and Qualifications for Boatswains' Mates

Boatswain's Mates need a combined score of 175 in the Verbal Expression (VE), Arithmetic Reasoning (AR) Mathematics Knowledge (MK) and Automotive and Shop Information segments of the Armed Services Vocational Aptitude Battery (ASVAB) test.

Alternately, they could present with a combined score of 135 on the Mathematics Knowledge (MK), Automotive and Shop Information (AS) and Assembling Objects (AO) sections of the ASVAB. 

There is no security clearance requirement for this position.


Sea/Shore Rotation for This Rating

  • First Sea Tour: 56 months
  • First Shore Tour: 36 months
  • Second Sea Tour: 60 months
  • Second Shore Tour: 36 months
  • Third Sea Tour: 48 months
  • Third Shore Tour: 36 months
  • Fourth Sea Tour: 48 months
  • Fourth Shore Tour: 36 months

Note: Sea tours and shore tours for sailors that have completed four sea tours will be 36 months at sea followed by 36 months ashore until retirement.