I guess "in reality" if you attacked the convoy succesfully and afterwards inserted the spy the navy would praise your undaunted determination, would shower you with medals and would call you a true example of the brave fighting spirit of the US submarine service. ComSubPac would invite you for coffee and introduce his beautiful daughter, telling her to be "nice" to "our hero".
If you had attacked the convoy and your attack failed, your boat suffering damage, forcing you to abort your mission, you would have been called an absolutely irresponsible disgrace of a naval officer, willfully disobeying orders and failing your mission because of a severy lack of personal judgement. ComSubPac wouldn't invite you for coffee and you would never find out that "daddy's little girl" had a penchant for heroes and could get quite passionate during a little moonwalk...
The choice is yours...
