GRC. The OE-303 is also referenced herein as: The antenna system.

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MIL-DTL-49295C

3.5.6 Dust. The antenna system shall be capable of operating for extended periods in a dry, windy (17 knots),

sandy environment without harmful structural deterioration, without degradation in specified performance, without

insulation breakdown, and without electrical flashover. The antenna system shall be capable of meeting the test of

method 510.5, procedure I of MIL-STD-810 (see 4.10.2, table IV).

3.5.7 Immersion. The antenna system, stowed in its bags, (less technical manual and transmission line), shall be

capable of being immersed to a covering depth of 3 feet of fresh water for a period of 2 hours. The immersion shall

not result in any form of physical deterioration, loss of fit, or reduction in electrical performance below specified limits

(see 4.10.4, table IV).

3.5.8 Bounce/loose cargo. The antenna system, disassembled and stowed in its bags, shall be capable of

withstanding shocks and exposure to wear induced during field transport as loose cargo. Some wear to the bags is

expected as a result of the test of 4.6. However, the bags shall not be frayed or torn to the extent that it ceases to

perform its function of containing and protecting its contents (see 4.6, table IV).

3.5.9 Sunshine. The antenna system shall withstand solar radiation occuring at a rate up to 360 BTUs per square

foot per hour without harmful deterioration (see 4.10.6, table IV).

3.5.10 Drop shock. The antenna system, disassembled and stowed in its bags, shall be capable of being

repeatedly dropped a distance of 30 inches onto any surface or edge without harmful damage to any component or to

the bags (see 4.7, table IV).

3.5.11 Wind/ice load. The antenna system, when erected for field operation according to the instructions, shall be

capable of withstanding 90 mile per hour winds without ice load and 60 mile per hour winds with .5 inch of radial ice

and remain erected, without harmful damage to the antenna, or to the mast including the guy system. (Note that the

test specified herein is for 90 mph winds only since this is easier to implement and performs essentially the same

purpose as a combined wind/ice load test (see 4.10.9, table IV).

3.6 Systems safety engineering.

3.6.1 Personnel hazards. Personnel hazards shall be kept to a minimum. This shall apply to tasks and efforts

such as the selection of parts, the complete manufacturing and assembly process, and any product baseline

configuration changes that may be implemented during the course of the contract. Verification that compliance with

this requirement has been achieved shall be through visual inspection (see table I).

3.6.2 Edge rounding exposed. Exposed edges shall be rounded to a minimum radius of .04 inches (1 mm), and

exposed corners to a minimum of .5 inches (13 mm).

3.6.3 Radioactive materials. Radioactive materials (such as luminous dials or markings, electron tubes, surge

arrestors and lenses) shall not be used.

3.6.4 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin

content of radio-frequency switch components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed

with a minimum of 3 percent lead, by mass (see 6.10).

3.7 Workmanship. Workmanship shall comply with standard manufacturing practices. Classification of defects

shall be in accordance with MIL-STD-252. The specified camouflage paint has a flat, dull finish which is easily

polished (marked) when parts are rubbed together. Occasional small marks are expected and can be tolerated.

Excessive polishing is considered to exist when greater than ten percent of the surface area of a given part is

marked. Such a condition may be induced by certain mechanical tests. When excessive polishing exists, the finish

shall be given a paint touch-up prior to final acceptance (see 4.3).