5.1.2 Environmental Conditions
Sections 5.1.2.15 - 5.1.2.20

5.1.2.15 Solar radiation. Requirements for solar radiation shall be as specified herein.

5.1.2.15.1 Fully hardened. Exposed equipment shall not be damaged and shall maintain specified performance when exposed to the sun at its service location. Equipment shall be tested in accordance with MIL-STD-810, method 505, procedure II.

5.1.2.15.2 Minimal acceptance. Generally, requirements for solar radiation are not applicable. Requirements for equipment operation under solar radiation shall be specified only for those installations determined by the specifier to be subject to solar radiation.

5.1.2.16 Spray tight enclosures. Requirements for equipment enclosures to withstand spray from ruptures or discharges from adjacent high pressure fittings are as follows:

5.1.2.16.1 Fully hardened. Requirements shall be tailored from MIL-STD-108. Typical applications include submarines and hazardous locations.

5.1.2.16.2 Minimal acceptance. General, requirements for spray tight enclosures is not applicable to equipment installed in controlled spaces.

5.1.2.17 Temperature ranges. Requirements for temperature shall be as specified herein. Temperature tests shall be in accordance with MIL-STD-810, methods 501 and 502, procedure I. Safety criteria shall be as specified in 5.1.3.11.9. The specified criteria for equipment installed in controlled spaces shall take into account failure of the environmental control system for up to 8 hours duration.

5.1.2.17.1 Fully hardened. Equipment temperature requirements for shipping and operating shall be tailored from Table III.

5.1.2.17.2 Minimal acceptance. Equipment temperature requirements for shipping and operating shall be tailored from Table IV. Equipment shall not be damaged when ambient conditions are outside nominal operating limits.

5.1.2.18 Underwater explosion. Requirements for underwater explosion shall be as specified herein.

5.1.2.18.1 Fully hardened. Equipment which is submerged and exposed to external sea pressure shall withstand the underwater explosion test in accordance with MIL-S-901 for wetted-surface type mounted items.

5.1.2.18.2 Minimal acceptance. Generally, requirements for underwater explosion are not applicable. Requirements for equipment operation underwater explosion conditions shall be specified only for those installations determined by the specifier to be subjected to underwater explosions.

5.1.2.19 Vibration. Requirements for vibration shall be as specified herein.

5.1.2.19.1 Fully hardened and minimal acceptance. Shipboard equipment shall be in accordance with the type I vibration requirements of MIL-STD-167-1.

5.1.2.20 Wind effects. Requirements for wind effects shall be as specified herein.

5.1.2.20.1 Fully hardened. The exposed equipment, or portions thereof, shall operate within performance limits in winds having a relative velocity of 140 km/hr (75 knots) with gusts up to 250 kilometers per hour (130 knots), and shall withstand, without damage, winds having a relative velocity as great as 185 km/hr (100 knots) with gusts up to 325 km/hr (175 knots).

5.1.2.20.2 Minimal acceptance. Generally, requirements for wind effects are not applicable. Requirements for equipment operation under wind effects shall be specified only for those installations determined by the specifier to be subject to wind effects.