326 (b) With the approval of the Secretary, any officer on the active list in the line of the Navy may, upon his application, be designated for engineering duty, aeronautical engineering duty, or special duty. (c) The types of special duty for which officers may be designated include communications, law, naval intelligence, photography, public information, psychology, and hydrography. (d) Officers designated for engineering duty, aeronautical engineering duty, or special duty are additional numbers in grade. They shall perform sea or shore duty appropriate to their special qualifications but may not succeed to command except on shore and then only as authorized by the Secretary. §5588.
Regular Marine Corps: officers designated for supply duty (a) With the approval of the Secretary of the Navy, any officer on the active list of the Marine Corps serving in the grade of colonel, lieutenant colonel, major, or captain may, upon his application, be designated for supply duty. (b) The number of officers designated under this section shall be in accordance with the requirements of the service as determined by the Secretary. An officer, while so designated, is an additional number in any grade, not above brigadier general, in which he serves. § 5589. Regular Navy and Regular Marine Corps: officers designated for limited duty (a) Original appointments to the active list of the Navy in the grade of ensign in the line, in the Supply Corps, and in the Civil Engineer Corps may be made from male— (1) warrant officers; (2) chief petty officers; and (3) first-class petty officers; in the Regular Navy, for the performance of duty in the technical fields indicated by their warrants or ratings. (b) Original appointments to the active list of the Marine Corps in the grade of second lieutenant may be made from male— (1) warrant officers; (2) master sergeants; and (3) technical sergeants; in the Regular Marine Corps, for the performance of duty in the technical fields in which they are proficient. (c) To be eligible for an appointment under this section a member must have completed at least 10 years of active naval service, excluding active duty for training in a reserve component. (d) Each officer appointed under this section is known as an officer designated for limited duty. H e may not suffer any reduction in the pay and allowances to which he was entitled at the time of his appointment because of his former permanent status. (e) Any officer designated for limited duty, upon his application and upon determination by the Secretary of the Navy that he is qualified, may— (1) if he is in the line of the Navy, be designated for engineering duty, aeronautical engineering duty, or special duty, or be assigned to unrestricted performance of duty;