Got it ...New sub offer is dependable of player's rating showed in CareerTrack.upc file and it hasn't anything to do with mission tonnage objectives. I'm not really sure how rating is actually earned except by sinking capital ships(1 point)...Patrol without tonnage will give you -1 point.
In one patrol the game actually gave me -3 rating points for 3 neutral ships?!
Code:
[CareerTrack 1]
ID=IDCareerTrack1
[CareerTrack 1.CareerStatusHeader]
ID=ID
UserPlayerNameDisplayable=Cpt.Shurz
CareerOptionsDate=1939-08-31 13:00:00
[CareerTrack 1.CareerStatusLast]
ID=ID
Reason=CSS_LastStatus
NameDisplayable=NULL
CurrentDate=1939-12-28 17:33:25
UniqueID=3957285610582654
Title=NULL
Text=NULL
EntryStatus=0
PlayerRankAchieved=Captain-Rank-10
PlayerCurrentLastPromotionDateTime=1939-08-31 13:00:00
CurrentFlotilla=2ndFlotilla
CurrentFlotillaBase=F2Wilhelmshaven
CurrentSDepartureDescription=979352,6.42534e+006,180.777
CurrentUPCFlotillaUserPlayerUnitType=F2VIIA
CurrentDifficulty=Realistic
PlayerCurrentRenown=960.000000
PlayerCurrentRating=1.000000
PlayerHighestRating=0.000000
PlayerPatrolsCompleted=0.000000
PlayerTonnageSunk=219407.000000
PlayerWarshipsTonnageSunk=42204.000000
PlayerMerchantsTonnageSunk=24214.000000
PlayerShipsSunk=0.000000
PlayerCurrentMedals=NULL
CrewMembersCurrentMedalsRepository=NULL
CrewMembersCurrentPromotionsRepository=1
PlayerCurrentObjectiveCode=South-Indian-Ocean
PlayerDefaultObjectives=ID1
PlayerCurrentObjectives=ID1
PatrolStartDateTime=1939-12-28 17:33:25