When firing a Doom Diver Catapult treat it as you would a stone thrower (guess range etc.). No template is used with the Doom Diver if the Goblin hits an enemy model then it automatically causes D6 Strength 5 hits on the unit with no armour saves allowed.

As Doom Divers are able to direct themselves onto their target to some extent, the player is allowed to roll a D3 and move the impact position (after scatter) by this many inches in any direction.

If a Doom Diver should misfire then roll a D6 and consult the stone thrower misfire chart.