You split into two teams, one forms a line across the playing field. They are blindfolded and stand close enough together to just touch hands. Each hand is a mine that will 'destroy' a ship (a member of the other team.) That team quietly tries to sneak along the line weaving in and out of the mines. After a minefield team member uses one hand and hits a ship, that hand is out of play for the round. Thus later ships may go through an unprotected area. When the whole team has gone through or all the mines are used, the teams change over. At the end of the game, the winning team is the one that managed to get the most ships through the minefield.
Source: From the original site.