Geeboo
The uniform on the far right is a naval officer a lieutenant .
The middle and left are enlisted chief petty officer ranks
The marks on the sleeves on the enlisted chief uniforms are years of service are years.
SteveBut why are they different colours?
Ah, missed it, thank you.Steve
Look at the bottom left of center of the chart. After 12 years of good conduct service you go from red to gold strips.