Re: Ice
"Might even be unconstitutional here in the U.S., where we have the right to arm bears or something like that."
I have it upon great authority from Billy-bob that one has the right to bare arms in the US.
Although, the actual intent, as insane as it sounds today, recall that gunpoweder ran firearms, they were flintlocks or fused cannons, *everyone* was allowed to have any one of those.
As a cannon cost as much as a fire engine of the period, rifles were a lifelong investment and pistols were for the gentry.
Today, one goes through the same background investigation as is required for a top secret security clearance, which involves neighbors interviewed, a decade of former neighbors and employers (if something cropped up in the seven year portion), current and former employers, current and former coworkers, one's criminal history, domestic violence makes you shit out of luck, current on child support.
*Then* you can get your howitzer.
Or machinegun.
Or disguised firearm.
Or "destructive weapons" (see food for howitzers and other things that can blow up the neighborhood).
*While* previously paying for a $200 tax stamp, which if rejected, see shit out of luck.
Me? I'm happy with a bolt action, lever action, semiautomatic action and nothing crazier. .50 BMG is flat out wrong for me, my osteoarthritis would never forgive me that abuse.
I'll be happy with a .308 precision fire system to enter into contests for cash prize.
My pistols are largely the same, expensive, due to customization to ensure pinpoint accuracy.
I keep a hunting rifle and pistol to dispatch still living game, lest it suffer further.
But, the majority of my firearms defend me from only one "tyranny" of this modern world; the tyranny of the unperforated "x" ring.
I enjoy that last bit.
Back to the matter at hand, I'd use radiothermic generators to melt the ice and slide in the probe behind.
But, I'm dubious on gathering enough energy, considering our current level of technology.
Making the damned thing work on Earth would be beyond our current level, considering the specifications. Might as well specify a TARDIS.