 E-4 to E-6 are considered to be non-commissioned officers (NCOs), and are specifically called petty officers in the Coast Guard.Their sleeve insignia is a perched eagle with spread wings (also referred to as a "crow") atop a rating mark (a rating mark, or "rate" is a symbol denoting their job category, similar to U.S. Army and U.S. Marines' MOS), with red chevron(s) denoting their relative rank below.The Coast Guard does not follow the Navy's practice of awarding gold chevrons for twelve years of good conduct, rather all petty officer rank chevrons and service hash marks are red, whereas gold is reserved for chief petty officers.