headgear of many European armies. For officers, a large eagle device is worn. For enlisted men, a small version of the officer's insignia centered on a disk is worn on the front. Warrant officers wear a gold eagle device centered on the cap. For garrison caps, generally the rank insignia is worn, but recent regulations call for the wear of the DUI. U.S. Air Force For U.S. Air Force service caps, a large, silver eagle device is worn on the service caps. For enlisted men, a smaller version of the officer's insignia is worn, but enclosed in a ring. The use of the same device is because the U.S. Air Force was once part of the U.S. Army. Navies Cap badges used by navies (and merchant mariners) around the world tend to follow the pattern in use by the Royal Navy: an anchor, or occasionally a cockade, surrounded by golden leaf-shaped embroidery, and often topped by a crown or another symbol. They may be worn on peaked caps or berets. For petty officers the leaves may be absent or replaced by a ring of golden cable. United Kingdom Royal Navy Cap badges in the Royal Navy differ between ranks but have some common features: junior rates (Able Seaman to Leading Seaman) do not wear cap badges, wearing the peakless sailor's cap in number one dress. When wearing a beret, junior ratings will wear a fouled anchor within a gold ring as a beret badge. Petty Officers wear a silver fouled anchor within a gold circle, with St Edward's Crown above the ring as their cap badge. That of Chief Petty Officers is the same, but with a small laurel wreath around the gold ring. That of warrant officers (both Class I and Class II) has a larger wreath around the anchor, but omits the ring. The laurel wreath around that of commissioned officers is larger still. Royal Marines In the Royal Marines, cap badges are worn on peaked caps and berets. Those of commissioned officers below the rank of colonel are split in two, the crown and lion atop, but separated from, the globe and laurels. They are brass and silver. Those of other ranks are of the same design but not split in two. They are plain brass. Blackened or subdued versions of both variants, those of officers and other ranks, are worn on berets, with combat uniforms. The