You can watch or download it from archive.org:
https://archive.org/details/goliath-awaits
"The trouble is most people are twats or cunts. Or both."

Watch it on YouTube It runs 3:11 sine it was a 4 hour minseries

It was actually a 1981 tv movie called "Goliath Awaits"
During World War II the passenger liner "Goliath" is sunk by a German submarine. Portions of the ship's hull remain airtight, and some of the passengers and crew survive. Over the decades they build a rigidly regulated society completely isolated from the surface world, until in contemporary times a diving team begins to explore the wreck. It starred, among many other names that would later become more well knownMark Harmon, Christopher Lee, Eddie Albert, John Carradine
If search it on IMDB you can see the rest of the cast list

Many do leave. Some don't want to. I think the diseases thing was discussed but it didn't stop anyone from leaving.

Possible spoiler .
Is this the mini series where the trapped people cant leave at the end?
they would die due to the modern diseases we have now?
Eat the Neocons.

It is available from Amazon on VHS. Dont think its been put to DVD yet.

It is not the Titanic. It is a movie called Goliath Awaits.

It was a two-part TV movie, shown in separate two-hour segments, in the early 80s. It was an interesting if preposterous idea, and had some good moments, but was too drawn-out to fill its time slot, had weak acting and direction, and the "big secret" the Captain was keeping was so stupid and unimportant (that the US wanted the British to send their fleet to North America if Germany invaded which was true, and no big secret even in 1939) that the very basis of much of the plot falls flat.
The "rebels" aboard a separate section of the ship certainly looked very tanned for having spent their entire lives submerged hundreds of feet below the water and away from the sun.

I know that mate-thats why its not called Titanic Awaits!Was this not a mini-series in the early 80s though?I seem to recall it was shown over several nights.

It's a different vessel in GOLIATH AWAITS, not the Titanic. It was a fictional liner that had been sunk by the Nazis during WW II.

You want crappy and preposterous?
Try - Beyond the Poseiden Adventure. Yeah, I'm gonna board a sinking ship everyone is leaving to look for treasure.

Explain

and about the same as the 70s original Poseiden Adventure.And MUCH better than Raise the Titanic
GulpWHAT?! Are you insane or have you just been stricken with some sort of mental affliction?

Dunno if its available on dvd,couldnt find it.However I downloaded it from a torrent site.Was good enough quality.Quite a good show,and an interesting premise.Didnt get critical acclaim at the time,rather a lot of undeserved abuse actually.Ive seen worse rubbish than this in a cinema,which had been praised to the heavens.In my opinion this is better than the crappy recent Poseidon,and about the same as the 70s original Poseiden Adventure.And MUCH better than Raise the Titanic.Enjoy!

Hey thanks guys, I didn't know about Goliath Awaits. Have to watch it!

The movie you are thinking of is Goliath Awaits:
http://www.imdb.com/board/10082461/

Bell ringing in my head right now.
I had forgotten about that show for years until reading your post. I saw it too but I was probably no more than 5 or 6 then.
I'll have to watch it again. Still need to find some other ones like Salvage II and Man From Atlantis.
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