Cite as: Hamilton, R.; Luther, G.; Vollbrandt, J.; Heineke, M.; Holthaus, J.: Options for decompression from tunnel work at pressures greater than 3 bars (30 metres of sea water). In: Schafstall, H.; Schultheiss, G.; Seeliger, D. (Ed.): Proceedings of the 3rd International Symposium on Underwater Technology. Geesthacht (D). 1991. 15/01-15/07.