Smoking the cigar
At the begginning of the film, Hackman and Washington are outside the sub, smoking cigars. Hackman states that, "it's his last breath of polluted air for 65 days."
I didn't understand this, as smoking was obviously permitted on the sub at the time, and the captain himself was seen chomping on a cuban cigar elsewhere in the film. Have I missed something here, or is this just a glitch in the script?