A professional who observes and reports by specified means of communications, enemy and simulated enemy locations to coordinate and adjust artillery or naval gunfire during combat or training. Respnsibilities include:

• Selects sites for observation posts.
• Sets up observation and communication instruments and equipment.
• Informs infantry, artillery, or naval gunfire ships of enemy activity, location of friendly troops and other pertinent intelligence data, using radio.
• Confers with artillery and gunship personnel to request and adjust artillery and naval gunfire.
• Confers with fire direction center personnel to report gunfire results based on knowledge of characteristics, capabilities, and limitations of artillery, mortar, rocket, and naval gunfire, using radio.