(a) All materials used in the construction of shoulder gun type line-throwing appliances
and equipment shall be of good quality, suitable for the purpose intended, and shall
conform to the requirements of this specification. The choice of materials shall be such that resistance to corrosion by salt water
or spray, shock, temperature change, and wear will be obtained. The use of dissimilar metals in combination shall be avoided wherever possible,
but when such contacts are necessary, provision shall be made to prevent such deleterious
effects as galvanic corrosion, freezing or buckling of moving parts, and loosening
or tightening of joints due to difference in coefficients of thermal expansion.
(b) The design and construction shall be proper and substantial for effective and safe
operation aboard ship.
(c) The workmanship shall be first class and free from any imperfections of manufacture
affecting appearance or serviceability of the gun.
(d) The gun, when loaded and fired in accordance with the manufacturer's instructions,
shall be capable of propelling through relatively still air, the service projectile
with service line attached, for a distance of not less than 75 m (250 ft.) with deviation
from the target not to exceed 4.5 m (15 ft.) either side.
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