I did put "set number of days spent in base" to 0 in sh commander cause i did want to play all important events like battle of Narvik that i did participated. After that i did eagerly wait french campaign and especially evacuation of Dunkirk...and guess, just on 30. april i get shot up by armed mechant, 66.67% hull integrity, i rush to supply ship in Spain to fast repair and next patrol is...in 3. june!
So much about "0 number of days spent in base", repair did took the month....
Only happy thing is my crew...wine and senoritas, a month long party.