I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: The Abyss Movie plot: Text appearing in red describes footage from the 1993 Special Edition of the film.The Montana, a U.S. Navy nuclear missile submarine, operating deep in the Cayman Trough in the Caribbean Sea, encounters an unidentified submerged object moving at high speed. The object passes very close to the submarine and the vessel loses power. Power is restored after a few moments, however the sub has drifted too close to the underwater canyon wall and collides with it, causing catastrophic damage. An officer is able to launch the sub's emergency beacon before the sub floods, drowning the entire crew.As Soviet ships and submarines head toward the area in an attempt to salvage the sub and its, and with a hurricane moving in, the Americans decide that the quickest way to mount a rescue is for a US Navy SEAL team to be inserted onto a privately owned experimental underwater oil drilling platform, which they will then use as their base of operations. The platform's designer and chief engineer, Dr. Lindsey Brigman (Mary Elizabeth Mastrantonio), is furious at the notion of her rig being commandeered for the mission. Her estranged husband, Virgil "Bud" Brigman (Ed Harris) is the foreman of the platform. However, Benthic Petroleum, the rig's financier, has already agreed to cooperate with the Navy and has promised the rig's crew substantial bonus pay. Lindsey herself travels down to the rig with the SEAL team to oversee the operation personally. After eight hours in a compression chamber, Lindsey and the SEAL team emerge; no one, however, sees that SEAL leader Lt. Hiram Coffey (Michael Biehn) has developed High Pressure Nervous Syndrome (HPNS) when he has a slight hand tremor. Lindsey and Bud promptly begin arguing with each other, revealing that they are a separated married couple. Bud becomes furious and throws his wedding band into a chemical toilet. He relents after a few moments and fishes it out, staining his hand blue with the toilet's sanitation fluid.The rig and SEAL teams prepare to investigate the submarine wreck. One... My question: How does Coffey die?
A:
Not answerable