Once again, because map contacts are such a controversial issue, we have removed any "realism" penalty associated with one decision or another.
Valid arguments:
1) The captain would be updated on a regular basis and/or on request by his crew as to the location and bearing of contacts... or the U-boat itself.
2) In GW/GWX, all contacts are grey in color requiring the user to identify the contact before decision is made to fire or not fire. Optics have also had their outermost zoom increased to help alleviate the loss of visual resolution of in-game graphics vs real life visual acuity.
3) The captain, although he should be able to do any job on the sub... cannot do them all simultaneously.
