[thackney]

Yes, Semisubmersible (floating) platforms have mooring lines.

On platforms this big and deep, the "line" can be pipe up to 30" in diameter.

More at:
http://www.bp.com/liveassets/bp_internet/globalbp/globalbp_uk_english/reports_and_publications/frontiers/STAGING/local_assets/pdf/bpf20_34-38_risers.pdf

[nikos1121]

Hard to believe that it would be stable with just two tethers. Unbelieveable.

The oil companies have always picked up the challenge. It’s mind boggleing that they can now drill at angles, therefore reducing the need for additional platforms. ANWR would be a snap, in fact you’d be probably hard pressed to find the oil drilling in an airplane, same as it’s hard to find strip minds.

Has McCain and others actually gone to these sites?