INFORMATION SECURITY

The probable effects of shock are shown in table 2-3. Table 2-3.-Probable Effects of Electric Shock It is imperative to recognize that the resistance of the human body cannot be relied on to prevent a fatal shock from 115 volts or even lower voltages. Fatalities from as low as 30 volts have been recorded. Tests have shown that body resistance under unfavor- able conditions may be as low as 300 ohms and pos- sibly as low as 100 ohms from temple to temple if the skin is broken. Volt for volt, dc potentials are normally not as dangerous as ac potentials. This is shown by the fact that reasonably safe “let-go currents” for 60-Hz ac are 9.0 mA for men and 6.0 mA for women, whereas the corresponding values for dc are 62.0 mA for men and 41.0 mA for women. The instruction to personnel in nonelectrical ratings regarding the safety precautions they must observe when using electrical equipment should em- phasize the following points: NEVER use any personal portable electrical equipment aboard ship unless it has been in- spected and approved. NEVER use portable electrical equipment if there is reason to believe it might be defective. Have it tested by authorized personnel. NEVER make repairs yourself. All repairs must be made by authorized personnel only. ALWAYS visually inspect portable electrical equipment before you use it. Look for dam- aged plugs, frayed cords, broken or missing ground connections, etc. ALWAYS report any shock you receive from electrical equipment, regardless of how slight. General Safety Promotion Promoting safety within the electronics division or on the ship in general requires that you, as the FC1 or FCC, become safety conscious to the point that you automatically consider safety in every job or opera- tion. Through the use of safety reminders and by your personal example, you pass safety consciousness on to other personnel. You must be thoroughly familiar with section D5 of Navy Safety Precautions for Forces Afloat, OP- NAVINST 5100.19. This is the primary source of general safety rules and regulations. Safety informa- tion is also given in the Electronics Installation and Maintenance Book, General, NAVSEA SE000-00- EIM-100. INFORMATION SECURITY The security of the United States, in general, and of naval operations, in particular, depends in part on successfully safeguarding classified information. All FCs must be security conscious to the point that they automatically exercise proper discretion in performing their duties and do not think of security of information as something separate from other matters. By doing so, security of classified information becomes a nat- ural element of every task and not an additional bur- den. You should be thoroughly familiar with the Depar- tment of the Navy Information and Personnel Security Program Regulation, OPNAVINST 5510.1. Following its guidance should be second nature to you. 2-10