noob question. is it possible to...

[nappy]

end/quit a mission that you have not managed to complete?

Reason im asking that my boat and crew was severly damaged otw to the mission
area, so i had to turn back. when i finaly made it to a friendly port (not the same one i left from since it now was part of the japan empire) i got the popup window, but the end mission option was grey and i could only chose "refuel and rearm" and "pospond".
Neither option was really desirable as half my crew neded to be replaced.
rearming and refuling, and then going back to complete my mission is madness since
i barely have enough crew to man the boat.

Should i try another port and hopefull i can "end" my mission there or?

what should i do ?

Any and all help appriciated.

nappy