The guy cannot put together a grammatically correct sentence so how the hell did he get the qualifications to be let loose anywhere near a technologically sensitive bit of kit as an SSBN in such a responsible job

THAT ls the frightening bit for me!
If anyone thinks for one second that the highly trained Officers and crew of a Nuclear submarine are going to put their lives and their boat at risk unnecessarily for ANY reason, they need their bumps felt. He may well have genuine concerns for the perceived lack of Security but this is not the way to address it!
Granted, in my day you needn't go far to find a fair few Ratings knuckledragging their way through a Commission (and the odd Officer too!). I've seen equipment/armament manned on occassion by bods you wouldn't let anywhere near a hot spoon never mind stuff lethal to life and limb but incidents were dealt with through a tried & tested system of checks and balances evolved over time to maintain the Status Quo. Any man has the right to approach his seniors all the way up the chain of command to the Captain and beyond if necessary to air his grievences! We learned very early on to 'Do your duty first and air your grievances afterwards at an appropriate time', and most importantly, 'If you can't take a joke, you shouldn't have joined'!
