What is it like inside the diver's helmet?

PajamaJams

I think I have an idea what it looks like inside of the diver's helmet. Take a look:
http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2012/06/ironMan_mkVII_HUD_01_jayse_hansen.jpg

The_Shark

Basically.

Bugzapper

Not quite.

An old-style bronze Standard Diving Dress ('hard hat') helmet is surprisingly heavy. Forty pounds (20-ish Kg) heavy, to be precise.

Tried to don an old Siebe-Gorman helmet underwater once, and the buoyancy assist provided by air feeding into it did little to decrease its apparent mass.

Couldn't do it. I most respectfully 'tip my lid' to all the Old-School Bubblies. They truly had Huge Brass Ones...

Modern diving helmets and full-face masks are considerably lighter, but they don't have a whole lot of high-tech gizmos inside them, as a rule. No HUD, possibly a microphone and bone-conducting speaker, and absolutely NO LIGHTS shining on your face. Any helmet-mounted lights are built into the exterior shell, or fitted somewhere on it.

For the sport-diver, a proper diving mask that cover the eyes and nose is all that's required, unless you want to communicate with Topside or your diving buddy(s). NEVER go diving with ordinary swimming goggles. Without an integral nose pocket like you'd find in a proper diving mask, you wouldn't be able to equalize the increasing pressure acting on the lenses as you descend. As the air inside the lenses of swimming goggles becomes compressed, they press against your eye sockets. This generally causes painful bruises to appear around your eyes.

Remember: No swimming goggles while diving or even snorkelling. Very Bad! >.<

For any would-be diver who feels claustrophobic or is allergic to latex/rubber, I'd recommend wearing a mask made from clear silicone. They do make a real difference when worn by claustrophobes, as the additional light coming in through the material provides a comforting illusion of 'open-ness'.

IvanKeska

I wish we got a diving suit complete with air hose, that would be needed for deeper depths. Because it annoys me a bit how you can just swim happily around at such depths, since we are using scuba and the deepest a scuba diver has gone is 155 meters.
Plus having a special dive suit for say 300m and down would be neat. Then again the suits needed to go that do are Exosuits which we are getting so, I guess we kinda are getting this anyways.

Bugzapper

Air hoses aren't a particularly good idea in an alien ocean well-populated with things that go "CHOMP!"

The Exo-Suit seems to be the best bet for hands-on exploration so far. Should be worth the wait.