yes,yes...it's very hard indeed...
history of JL1 development:
Ground lunch test, 1981-1982 ,3 times all success
SSGN lunch test, 1982 ,2 times 1 failed
SSBN dummy missle lunch test, 1984 , 4 times all success
SSBN test ,1985 ,3 times, all failed
SSBN full statuse test ,1988 ,2 times all...