How laden with goods is the convoy. When the convoy is revealed, the dealer also names the suit which will be active in support of or against the convoy. The suit can be either Air, Surface, Sub or Combined. Players then each have a chance to place a force card from their hand either in support of or attacking the convoy. There are some cards which are eligible to be played in any of the oceans.
Some cards are eligible to be used in any of the declared suits.
Further, you must keep an eye on other cards that have been played to see if they are 'fated' and if you have a force card in your hand which is the affecting ship. If another player played a force card which was 'fated' to be sunk by another particular card and you play that card, you immediately sink that card and take it as victory points. Since card play is in a clockwise fashion beginning with that round's dealer, players must decide on whether to play an Allied card in support of the convoy, or a Germany card in an attempt to sink it. Each force card has a value ranging from 0 - 6, and this may be supplemented with the play of an eligible bonus or special card. Some of the cards have an unknown value which is only determined at the conclusion of card play.