2004 Centurion Avalanche For two years the Avalanche has proven it to be a powerful force in the world of wakeboarding and is back for yet another record-setting year. The size, seating and convenience of the Avalanche is unmatched by any other boat in its class. Need easy platform access? The Avalanche has a unique step-through transom thus eliminating the need to climb all over your interior. If you want a full-width padded back deck then the Avalanche C4 is the choice for you. - 2004 Centurion Avalanche