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Is that deep sea thing actually in the fluff? Because sealed from vaccuum or 1 atmosphere of pressure and sealed from water in 20+ atmos of pressure are two different things - the pressure is very different and going in different directions, for one.


Probably not. Water has more of an effect on faster moving projectiles than slower - arrows and .22 bullets will go into water by merely slowing, .308 and .50 cal will shatter in the first foot of water. a Railgun slug in water would probably send up an impressive jet of water, but not got anywhere.

Also, unless it was pure water, the charge from the rails would bleed out into the water, and the gun wouldn't fire in the firs place.

well, it depends much on the style you plan - mobile or static.
mobile consists mainly of crisis battlesuits, fire warriors in devilfish transports and hammerheads
static substitutes devilfish warriors with more foot ones and/or kroot, and replaces hammerheads with broadside battlesuits, leaving crisis battlesuits as the most mobile element.

I know how the pressures work and such. I think that the fluff is in the Space Wolves Codex. That was what I originally heard it as being from, anyway.

As far as the railguns functioning underwater, the projectiles would not have the problems that bullets do because they are starting underwater. One of the biggest issues with bullets is the transition from air to water. Also, this is not from a gas based propulsion system. The force behind the bullet when it hits the water makes it split. With the railgun rounds being surrounded by water before the firing, they wouldn't suffer the same stresses. Given that railguns function by magnetic accelleration (and I think that's how Tau ones function as well) there would not be a bleed of energy so long as the actual power system was contained. The erstwhile power loss would be low if not negligible in an enclosed system.

Well you don't really need kroot you can just use them as the extra troop choice.

the army list i would like to run is that it would have some units for a stealth attack but also should have enough strength and power to withstand and attack in a frontal assault way or anything similar to it and have an equal balance of troops and vehicles

A group of ten Firewarriors beat my Eversor assassin down in combat...

My recomendation would be to take 2-3 squads of fire warriors, as it sounds like you'll be playing a mostly static army.

Take 1 devilfish and 2 teams of two broadsides each. give the team leader of each team the hard wired upgrade that allows him to fire seperatly from the others in his squad.

Get a small squad or two of 5 pathfinders each to spot for your broadsides.

Take a crisis suit team with mid ranged anti marine weapns (missle pod, plasma rifle) and a stealth team to support them. these guys will watch your flank. Make sure that your other flank is covered by terrain or a board edge. If you're crafty enough, you might even use the unprotected flank as a lure.

If that's not your thing, then cover it with a hammerhead and your commander.

The flank guarding elements also have the mobility to out-flank the enemy if they try to rush your center, and your center has the range to target the enemy if they try to rush your flanks, plus the flank's mobility would allow one to quickly respond and move in to help should the other come under attack.

Good list. You'll have a very mobile force that most people won't know how to deal with. In my experience, most people play their army in a static, gunline fasion. You should have no problem once you've mastered it.