Table 1-38.Effects of Heat and Humidity
When apparent temperatures are between 90 and 105 degrees, heat cramps, heat exhaustion, and
heatstroke are possible after prolonged exposure and physical activity. These become likely when
apparent temperatures are between 105 and 130 degrees. Over 130 degrees, heatstroke is imminent. You
should note that heatstroke can be fatal if medical care is delayed.
The general maintenance section provides you with information on cleaning solvents, lubricants,
corrosion control, use of the oscilloscope, troubleshooting, classes of overhaul, and types of equipment
modifications. It also provides information such as material identification, names of organizations that
provide outside technical assistance, and publications and documents that will assist you in day-to-day
Corrosion Control (Cleaning and Lubricating)
A corrosive atmosphere can damage unprotected electric and electronic equipment. You should be
aware of the harmful effects of moisture and, in particular, salt spray and salt-impregnated air. To prevent
corrosion, you should maintain an effective cleaning and lubricating schedule. Standard preventive
maintenance (PMS) procedures provide only minimum protection. Any schedule should include dusting
and cleaning, lubrication of moving parts, and the use of approved solvents or wetting agents to remove
any dust, dirt, oil film, salt, or other contaminant.
Table 1-39 is a list of standard Navy lubricants and solvents and their uses, as specified in Military
Standard 454M (MIL-STD-454M).