iPlanner’s and Estimator’s Handbook, NAVFAC P-405. There is a big need in the Navy for petty officers who  are  skilled  supervisors.  Consider  the  role  of supervisor as a big challenge and endeavor to become proficient in all areas of the supervisor’s job. Q12. What are the two benefits for the Navy when a project is planned properly? Q13.    As a supervisor, what is the first thing you should do once planning is complete? COLORS FOR SAFETY LEARNING  OBJECTIVE:  Recognize  piping,  gas cylinders, and general safety color coding. Color warnings provide for marking physical hazards,   for   indicating   the   location   of   safety equipment,  and  for  identifying  fire  and  other  protective equipment.  As  a  Utilitiesman,  you  may  often  be concerned  with  uniform  colors  used  for  marking pipelines  carrying  hazardous  materials,  compressed gas cylinders, and fire- protection equipment. CLASSES OF MATERIALS AND THEIR COLOR CODES Five classes of materials have been selected to represent  the  general  hazards  for  all  dangerous materials, while a sixth class has been reserved for fire- protection materials. A standard color represents each of these classes, as shown in table 1-1. In some instances, piping systems that do not require  warning  colors  may  be  painted  to  match surroundings; in other instances, such systems may be painted aluminum, black, or remain unpainted. MARKING PIPING SYSTEMS In   addition   to   color   warnings,   WRITTEN TITLES should be used to identify hazardous or dangerous materials conveyed in piping systems. Table  1-1.—Warning  Colors Class Standard Color Class of Material a Yellow,  number  13655 FLAMMABLE MATERIALS. All materials known b c d Brown, number 10080 Blue, number 15102 Green, No 14260 ordinarily as flammables or combustibles. Of the chromatic colors, yellow has the highest coefficient of reflection under white light and can be recognized under  the  poorest  conditions  of  illumination. TOXIC AND POISONOUS MATERIALS. All materials extremely hazardous to life or health under normal conditions as toxics or poisons. ANESTHETICS AND HARMFUL MATERIALS. All  materials  productive  of  anesthetic  vapors  and  all liquid chemicals and compounds hazardous to life and property  but  not  normally  productive  of  dangerous quantities of fumes or vapors. OXIDIZING MATERIALS. All materials which readily furnish oxygen for combustion and fire producers which react explosively or with the evolution  of  heat  in  contact  with  many  other  materials. e Gray,  number  16187 f Red, No. 11105 PHYSICALLY DANGEROUS MATERIALS. All materials not dangerous in themselves, which are asphyxiating inconfined areas or which are generally handled in a dangerous physical state of pressure or temperature. FIRE PROTECTION MATERIALS. All materials provided inpiping systems or in compressed-gas cylinders  exclusively  for  use  in  fire  protection. 1-18