The triangle is yellow on both sides. The word GAS in red 2-inch (5 cm) block letters is placed on the side of the markers facing away from the contamination (front). Fluorescent paint is used, when available. The name of the agent, if known, and the date and time of detection are also placed on the front of the marker at the time of emplacement with paint, marking pencil, or grease pencil.

BIOLOGICAL CONTAMINATION MARKERS

The triangle is blue on both sides. The letters BIO in red (fluorescent paint, if available) 2-inch (5CM) block letters are placed on the side of the markers facing away from the contamination (front). The name of the agent, if known, and the date and time of detection are also placed on the front of the marker at the time of emplacement.

RADIOLOGICAL CONTAMINATION MARKERS

The triangle is white on both sides. The word ATOM in black 2-inch (5 cm) block letters is placed on the side of the markers facing away from the contamination (front). The dose rate, date and time of reading, and the date and time of burst, if known, are also placed on the front of the marker at the time of emplacement.

CHEMICAL MINEFIELD MARKERS

The triangle is red on both sides. On the side facing away from the contamination (front) appear the words GAS MINES in yellow 1-inch (2.5 CM) block letters (fluorescent paint, if available) with a horizontal yellow 1-inch (2.5 cm) stripe underneath the lettering. The chemical agent in the mines and the date of emplacement may also be inscribed on the front of the marker is desired by the commander.