Ok so I thought I would run a little test.
Managed to find me a convoy off SW Ireland heading west. The weather was foul and I wondered how long it would take until it changed. Oh it is may btw.
Anyway I heard this voice in my head saying "go West my son" so I did and shadowed the said convoy for a bit to see if it changed. Well 5 days later!!!!!!
And still no bloody change! And it's May!
AAAAARRRRRGGGGHHHHHHHHH!
Well one result is that I am not wondering about the weather any more! It is straight in with the torps and then run for home

as I am bored to tears shadowing this convoy!