Despite the Navy's claims to the contrary, private shipyards are on average less expensive than public shipyards for the most common type of attack submarine overhaul, according to the Congressional Budget Office. Lawmakers on the House Armed Services Committee asked CBO to study the issue after Navy officials stated they prefer to use public shipyards over private because the service believes it costs less, according to the report issued Sept. 12. CBO's study focused on "docking selected restricted availabilities" for...