Bridge and watch crew

[Yoriyn]

Hi
I back to SH3 after almost year. After few single mission, can enybody explain me how in the game a watch crew system is working?

In Bridge section of the u-boat screen we have got 5 spaces for crew:
one for officer and four for sailors.

1. If I just left a port in sep '39 and I don't need full bridge in Ost-West Canal, and I left only one. Is this one is able to look around the boat or each place is connected to specific area around uboat (ex: man on first place searching horizont only on front of the boat, second - left, third ...).

2. If There is no WO on the bridge, do I still recieve message "ship spotted" or not.