report for the period March 1974 to September 1974 reflects that the Veteran had low and declining performance , inconsistent effort , lackadaisical attitude on occasion , marginal motivation , and satisfactory military behavior . The Board notes that this was prior to his service on a submarine and was while he was attending the Naval Nuclear Power School at Mare Island , California . An evaluation report for a period ending in April 1975 reflects that the Veteran had completed prototype training and compared to other trainees of the same rate and experience , his rate of qualification progress was fair , his watch standing performance was fair , and his qualifications were good . A service record reflects that on July 21 , 1976 and July