Use luminous tape on the backside of equipment to assist with night operations. Better known as "Cat Eyes" small pieces of luminous tape applied to the backside of your headgear and rucksack flap assists with keeping individuals in formation during night movements. The light signature luminous tape emits is so minimal it does not compromise security while allowing individuals to see the person in front of them. Luminous tape is an excellent marking system when light discipline is a must and elements are moving in a file formation during limited visibility and in heavy vegetation. Luminous tape applied to equipment also assists with finding rucksacks left at an Objective Rally Point (ORP) when units return upon completion of a mission. Leadership designates the shapes luminous tape is cut in to, assisting with team identification. For example A Team's cat eyes are "Diamond Shaped" while B Team's cat eyes are "Triangle Shaped." When moving at night an individual will quickly realize they are moving with the wrong team if the individuals to their front have a different set of cat eyes then their own. Once luminous tape shapes are assigned to a team, this information should be included in the organization's Standing Operating Procedure (SOP) under Command and Control (C2). Pictured are the standard cat eyes sewn on a USGI helmet band and a set of cats eye sewn on the back of an old patrol cap. The tape on the 15 year old patrol cap still provides a light signature. You can purchase luminous tape in both sheets or rolls by conducting a search on Amazon.com or Ebay. I recommend purchasing tape sheets because they are easier to cut triangles and diamonds if used for team identification.