The Bomarc warhead was lethal to a medium bomber aircraft up to about one kilometer. The warheads were mounted to the missiles for 90 day intervals, after which they underwent periodic inspection and maintenance.
The first production device was made in January 1959, with production starting in June, withdrawal in August due to a significant safety issue, and re-release in September with a temporary fix. A one-point safety problem was discovered in 1960 and a W40 mod 2 with a fix was developed and sent out in December 1963.[1]