That's probably on you. All banana are basically clones (yes there's some outliers) and have been since the 50s. The methods in harvesting and transport (13°C, strong ventilation) and ripening (ethylene gas, slightly higher temperature) have been unchanged since about that time. I worked on reefer ships, we mostly carried bananas.

That depends, but ideally the lookout and officer would be able to concentrate on the watch duties when on watch. But during the daytime the lookout has to clean the mess, help the cook sometimes, do odd-jobs. In my opinion a steward for the cook would be a great addition und just 1 or 2 additional able seaman would be great. With a smaller crew it is possible to work safely, but you don't have much room for error. Like when some people get sick or when an important piece of automation breaks, and these systems now have to be manned

1. Yes it is correct that a lookout is only required during the night, during the day it's only recommended (depending on the situation)
2. No it's not German flagged, it was flagged in Antigua and Barbuda, a classic flag of convenience (even though the German secondary register can also be called as such, different story)
3. It is my personal opinion that a lookout is always nessesary, since the OOW is often times not able to fully concentrate on the watch itself and has additional duties.
4. It's fairly known that German companies are a bit more stingy in terms of crewing. When I tell my English counterparts that we man a 200m ship with 17 men (of whom only 13 are required by law) I get some funny looks
5. A BNWAS is always a good system to have, although it can be quite a nuisance in difficult situations

Exactly, there should have been a lookout on that bridge