Officers of the Staff Corps do not have the “curl” in the upper rank stripe.
The insignia on the front of the cap consist of an oval medallion surrounded by a gold wreath and surmounted by the Royal Crown of Italy in gold on a blue ground. The medallion in the center shows the corps or branch of the service, Line officers having a gold foul anchor on a light blue ground, Engineer officers a gold three-bladed propeller on a black ground. Medical officers a red Geneva cross on a white ground, Naval Constructors a gold helmet on a red ground, and Paymasters a gold star on a red ground.
The band of the cap is of the distinctive color of the corps or branch of the officer and has sewn upon it gold stripes indicating the rank of the wearer.
On the right side of the cocked hat there is a cockade of red, white and green silk.
Chief Warrant officers wear uniforms similar to the commissioned officers’ uniforms with one gold stripe broken by diagonal blocks of blue silk with the corps mark above it on the cuffs. Their cap has a black mohair braid band and insignia on the front like those of commissioned officers except that the Royal crown is omitted.
Warrant officers wear the same uniform as Chief Warrant officers except that the stripe of gold braid on the sleeve is omitted and the corps insignia alone are worn on the sleeves above the elbow.
Enlisted men wear uniforms of dark blue cloth or white duck depending upon the temperature, these uniforms being similar in general design to those of the United States Navy.
The insignia of rank for Petty officers are as follows:—
| Chief Petty officers | A gold chevron of one wide stripe and one narrow stripe on each sleeve above the elbow with the branch mark above it. An additional chevron is added after three years’ service in the grade. |
| Petty officers | A red chevron of one wide stripe and one narrow one on each sleeve above the elbow with the branch mark above it, in red. |
| Leading Seamen | A chevron of one narrow red stripe with the branch mark above it, in red. |
| Able Seamen | The branch mark in red on each sleeve above the elbow. |
| Ordinary Seamen | The sleeves are plain. |
The specialty or branch marks for the different corps or branches of the enlisted men are as follows:—