Hurricane12, you are correct. Unless they ran a chit up to the SECNAV for approval, which I am sure he/she would (sarcastic).
Navy Uniform Regulations:
" a. Authorized Insignia. The listing below constitutes those breast insignia, alphabetically by category, authorized for wear on the naval uniform. Breast or qualification insignia of other services shall not be worn. Breast or qualification insignia of other nations shall not be worn on the naval uniforms unless specifically authorized by the Secretary of the Navy."
Marine Corps Uniform Regulations:
"a. Per the current edition of MCO P1000.6, Assignment Classification and Travel Systems (ACTS) Manual and whose right to wear the insignia has not been specifically revoked, a Marine qualified or designated as a naval aviator, naval flight officer, Marine aerial navigator, naval aviation observer, naval or combat aircrew member, parachutist, explosive ordnance disposal technician, or U.S. Navy diver, will wear appropriate breast insignia according to the following regulations.
b. A Marine designated as a naval astronaut (pilot, NFO, or mission specialist) will wear the appropriate naval astronaut insignia as prescribed by the Department of the Navy.
c. In addition to the breast insignia authorized in these regulations, naval medical officers assigned to Marine Corps units who are designated flight surgeons may wear the U.S. Navy gold metal flight surgeon insignia on Marine Corps service and utility uniforms.
d. Only those breast insignia listed in these regulations are authorized for wear on Marine Corps uniforms.
e. Other U.S. service pilot/navigator insignia and foreign pilot insignia may be worn, but only as authorized in subparagraph 4002.3.
f. Any other U.S. service/foreign/civilian breast insignia may be accepted by an individual, but will not be worn on Marine Corps uniforms."