â¢ Position the grinder in a way that the guard provides the maximum protection to the operator from sparks and/or flying debris. â¢ Use caution when grinding in corners because a sudden, sharp movement of the grinder may occur when the wheel strikes the secondary surface.
A boater may not approach within 100 yards of a military vessel; it must slow to minimum speed within 500 yards of any naval vessel. 8 people found this useful.
For observers standing on a hill or tower 100 feet (30 m) in height, the horizon is at a distance of 12.25 miles (19.71 km). If the US Navy ever said the horizon was 14 miles away, it must have been from the masthead of a large ship - about 130 feet (39.82 meters) above the water. Of the 244 feet between keel and masthead of a Nimitz-class carrier, about 38 is below the waterline, and about 150 feet is the island superstructure.