>>>And once we solve this problem then we can take up the fact that this kind of submarine has no surface to air missile capability.
Can the sub be refurbished to have missile capability?
If it wasn't a missile at all, could it have been a 'shoe bomber' type of incident? Would that explain the passenger list I posted about with the 'unnamed passengers'?
What other reasons would passengers be unknown on an aircraft?
Depends on what type you are talking about. Shoulder fire missiles wouldn't require any sort of modifications at all. That Iranian Sub Website liked to above mentions Seacat and Skyguard missiles. The Seacat required a launching platform that was over 6 feet tall and weighed over a ton. Not something that can be added to a sub. And I've never heard of a SAM called Skyguard from the UK or any other country.