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  Perhaps one of the strangest of all Mekboy creations is the
  gigantic minelaying vehicle that patrols Gogrok Island, the
  operational base of the Ork savant known as Orghamek.
  Though an Ork minelayer in itself is not unheard of,
  Orghamek’s creation, comprised of over fifty tons of rusted
  metal and salvaged scrap, floats through the air in a way
  that beggars belief.
  Orks are often unsatisfied with the concepts of minefields.
  After all, such static defences require the foe to transgress
  upon Ork territory to be effective, and few are the enemies
  prepared to take the fight to the Orks on their own terms.
  Still, there is something undeniably appealing to an Ork
  about the bloody spectacle of a crude bomb detonating in
  the thick of the enemy ranks.
  To reconcile this, Orghamek created the floating minelayer,
  a craft held aloft by powerful repulsor fields. Its cavernous
  bomb bays contain row upon row of specially-built
  explosive mines that themselves contain repulsor fields,
  albeit ones of far lesser potency. 
  The Minelayer uses a winch-and-claw arrangement to place
  these mines at the rear of the craft, where their fields are
  remotely activated, enabling the mine to stay hovering high
  in the air. Should a foe attempt to cross the ground
  underneath one of the Minelayer’s charges, he will collapse
  the delicate repulsor field, causing the mine to plummet
  down on top of him. Should the impact of such a crude
  device not kill the trespasser, the ensuing detonation of a
  ton of high explosive invariably will.
  ORK MINELAYER
  POINTS: 250
  Sensor snout
  The ‘Minepig’
  Battle of Gogrok Island, M41
  Anti-gravitic
  gut plates
  Mine Grabber
  (also used for
  light crane work)
  UNIT: 1 Ork Minelayer
  TYPE: Super-heavy vehicle.
  STRUCTURE POINTS: 2
  WEAPONS AND EQUIPMENT: 
  - Minelaying winch (see Minelayer, opposite)
  OPTIONS:
  - Can be upgraded to have up to 3 big shootas at +5 points
  per gun and/or a killkannon at +60 points.
  SPECIAL RULES
  Drifter: An Ork minelayer moves at a sedate pace, occasionally
  dropping the odd offering to hang in the sky. The Minelayer is
  treated as a Skimmer that moves a maximum of 6” a turn.
  Immobilised results will cause it to settle to earth but not to
  become a wreck. Due to its deadly cargo, add +3 to the roll if
  the Minelayer has to roll on the Catastrophic Damage table.
  Minelayer: Unless it has suffered a Gun Crew Shaken or Driver
  Stunned result in the previous turn, the Minelayer may lay one
  mine per turn at the beginning of the Ork shooting phase.
  Mines remain in place once they have been laid. Each Mine
  may be detonated if an enemy model passes within 2” of its
  base. Remove the mine and replace it with the 10” Blast
  template. Every model under the template takes a S8 hit with
  an AP of 3.
  ARMOUR
  BS
  FRONT
  SIDE
  REAR
  2
  13
  12
  11
  Repulsor prongs
  Size Komparison
  © Games Workshop Limited 2007. Games Workshop, Warhammer, Warhammer 40,000, Apocalypse are ©, TM and/or ® Games Workshop Limited 2007. All rights reserved.
  
SOURCE: textdata/thevault/Warhammer/40k/1st-8th Editions (Prior)/5th Edition (2008)/Apocalypse Datasheets/40k 5e - Ork - Minelayer.pdf