Power of the Machine Spirit.

[Relic]

If one was to to use this power say from a land raider with a multi-melta destroy a transport. then could you use the rest of the vehicles weaponary to shoot upon the passangers?

[Tynskel]

in my opinion, why not. But you might want to double check the rulebook, I believe it says that a model/unit must declare all shooting before firing.

That would include announcing targets before firing. In this case, you would say that you are firing the multi-melta at the transport, and the rest of the weapons will fire at the units that disembarks. If the Transport is not destroyed, the other weapons would not get to fire because they cannot draw Line of Sight.

This could interfere with all weapons firing at the same time, and the unit would be embarked at the time of firing all weapons.

[Rapture]

All of your shooting targets have to be declared at the same time. If it isn't there you can't shoot at it.

[Sandman2663]

You must declare all valids targets at the start of the PotMS Vehicle shooting. BRB pg 15

Also, PotMS does not work if you pop smoke in the Movt phase. FAQ Space Marine v 1.1

[SeattleDV8]

Not even a question, no you may not.

BRB pg. 67 "...all models in a single unit fire simultaneously, so a squad cannot take out a transport with its lascannon and then mow down the occupants with their bolters."
At the time that the unit targets the transport the embarked models can't be targeted.

[Valkerie]

Actually, I believe you can. In the Space Marine Codex, on page 81. it states, "A Land Raider can fire one more weapon than would normally be permitted. In addition, this weapon can be fired at a different target unit to any other weapons, subject to the normal rules for Shooting."

Seems to me that you can use the multi melta to open a transport then use the other weapons to shoot the squad inside, since those would be two separate target units. Assuming you get close enough, this would be really nasty againse Dark Eldar transports. A Crusader that fired its multi melta at 12" or less would be almost guaranteed to penetrate, +2 to the penetration roll gives a very good chance of destroying the vehicle. Then the Crusader opens up with TL Assault Cannon and Hurricane Bolters on the squad. Should cause more than a little carnage. A Redeemer would be even nastier, with its flame template.

Of course, that's assuming you can get close enough. A smart DE player will assign a high target priority to Land Raiders. :)

[Archon Charybdis]

In addition, this weapon can be fired at a different target unit to any other weapons, subject to the normal rules for Shooting."

Right there. The normal rules for shooting include the stipulation that a unit's firing is resolved at the same time. The Landraider can't shoot at the squad inside, because there is no disembarked squad until after it's shooting is complete.

[Bean]

No, Valyrie. The ability to target two separate units doesn't constitute the ability to target at two separate times, which is the issue, here. You still have to choose the target for both the multi-melta and the hurricane bolters (or flamestorm cannon or whatever) before either shoots. Since the squad in the transport isn't a legal target until after the melta shoots, the 'tactic' you suggest is not legal.

[lobster-overlord]

"the normal rules of shooting" referenced however, preclude you from delaying the shots of any weapon from a particular unit/vehicle. All weapons, even if declared at different times, are considered to fire simultaneously, which means that the POTMS gun will still fire at the same time as the rest of the weapons.

So, you can crack a transport, however, once the shots are resolved and the troops pop out, the vehicle is considered to have completed its turn's shooting phase.