Roach 's eldest son John Baker Roach assumed head of the business although the yard would never again regain the pre-eminent position in American shipbuilding that it had enjoyed under Roach Sr .
The business would continue for another 20 years .
Roach 's eldest son John Baker Roach assumed head of the business , which would continue for another 20 years , although the yard would never again regain the pre-eminent position in American shipbuilding that it had enjoyed under Roach Sr .