... board, number of days at sea, number of support equipment, area of regard)?Are there any changes to contractual, regulatory, and statutory requirements that you believe may have added to the ... e attack submarine rate is lower, since there was a scaling back (smaller and less complex) between the Seawolf and Virginia classes in a deliberate attempt to make a more a ordable sub-marine. ... 828One important caveat to these data is that the values are those reported in the open literature. So, the accuracy and validity of the information is questionable, particularly with respect...