Rear-Admiral of the Red was a senior rank of the Royal Navy of the United Kingdom, immediately outranked by the rank Vice-Admiral of the Blue (see order of precedence below).

(pictured opposite is the command flag for an Rear-Admiral of the Red).

(pictured opposite is the command flag for an Rear-Admiral of the Red).

[5] The Navy was divided into three squadrons Red, White and Blue in order of seniority.

Ships of the Royal Navy flew the Ensign that coincided with the squadron of their commanding officer.